docs: better docs, mv doxygen to sphinx

This patch refactors the VPP sphinx docs
in order to make it easier to consume
for external readers as well as VPP developers.

It also makes sphinx the single source
of documentation, which simplifies maintenance
and operation.

Most important updates are:

- reformat the existing documentation as rst
- split RELEASE.md and move it into separate rst files
- remove section 'events'
- remove section 'archive'
- remove section 'related projects'
- remove section 'feature by release'
- remove section 'Various links'
- make (Configuration reference, CLI docs,
  developer docs) top level items in the list
- move 'Use Cases' as part of 'About VPP'
- move 'Troubleshooting' as part of 'Getting Started'
- move test framework docs into 'Developer Documentation'
- add a 'Contributing' section for gerrit,
  docs and other contributer related infos
- deprecate doxygen and test-docs targets
- redirect the "make doxygen" target to "make docs"

Type: refactor

Change-Id: I552a5645d5b7964d547f99b1336e2ac24e7c209f
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>

30 files changed, 85 insertions, 0 deletions

diff --git a/docs/developer/plugins/acl_hash_lookup.rst b/docs/developer/plugins/acl_hash_lookup.rst
new file mode 120000
index 00000000000..934be2816ba
--- /dev/null
+++ b/docs/developer/plugins/acl_hash_lookup.rst
@@ -0,0 +1 @@
+../../../src/plugins/acl/acl_hash_lookup_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/acl_lookup_context.rst b/docs/developer/plugins/acl_lookup_context.rst
new file mode 120000
index 00000000000..e9e15ed3684
--- /dev/null
+++ b/docs/developer/plugins/acl_lookup_context.rst
@@ -0,0 +1 @@
+../../../src/plugins/acl/acl_lookup_context.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/acl_multicore.rst b/docs/developer/plugins/acl_multicore.rst
new file mode 120000
index 00000000000..564b6a10876
--- /dev/null
+++ b/docs/developer/plugins/acl_multicore.rst
@@ -0,0 +1 @@
+../../../src/plugins/acl/acl_multicore_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/bufmon_doc.rst b/docs/developer/plugins/bufmon_doc.rst
new file mode 120000
index 00000000000..3578898d323
--- /dev/null
+++ b/docs/developer/plugins/bufmon_doc.rst
@@ -0,0 +1 @@
+../../../src/plugins/bufmon/bufmon_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/cnat.rst b/docs/developer/plugins/cnat.rst
new file mode 120000
index 00000000000..c261d501228
--- /dev/null
+++ b/docs/developer/plugins/cnat.rst
@@ -0,0 +1 @@
+../../../src/plugins/cnat/cnat.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/dhcp6_pd.rst b/docs/developer/plugins/dhcp6_pd.rst
new file mode 120000
index 00000000000..80bd946c952
--- /dev/null
+++ b/docs/developer/plugins/dhcp6_pd.rst
@@ -0,0 +1 @@
+../../../src/plugins/dhcp/dhcp6_pd_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/flowprobe.rst b/docs/developer/plugins/flowprobe.rst
new file mode 120000
index 00000000000..7e2fbd2f079
--- /dev/null
+++ b/docs/developer/plugins/flowprobe.rst
@@ -0,0 +1 @@
+../../../src/plugins/flowprobe/flowprobe_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/index.rst b/docs/developer/plugins/index.rst
new file mode 100644
index 00000000000..9aedc89bdca
--- /dev/null
+++ b/docs/developer/plugins/index.rst
@@ -0,0 +1,41 @@
+.. _vpp_plugins:
+
+=======
+Plugins
+=======
+
+vlib implements a straightforward plug-in DLL mechanism. VLIB client
+applications specify a directory to search for plug-in .DLLs, and a name
+filter to apply (if desired). VLIB needs to load plug-ins very early.
+
+Once loaded, the plug-in DLL mechanism uses dlsym to find and verify a
+vlib\_plugin\_registration data structure in the newly-loaded plug-in.
+
+For more on plugins please refer to :ref:`add_plugin`.
+
+
+.. toctree::
+    :maxdepth: 2
+
+    quic
+    cnat
+    lcp
+    srv6/index
+    marvell
+    lldp
+    nat64
+    nat44_ei_ha
+    pnat
+    lb
+    lacp
+    flowprobe
+    map_lw4o6
+    mdata
+    dhcp6_pd
+    ioam
+    wireguard
+    srtp
+    acl_multicore
+    acl_hash_lookup
+    acl_lookup_context
+    bufmon_doc
diff --git a/docs/developer/plugins/ioam.rst b/docs/developer/plugins/ioam.rst
new file mode 120000
index 00000000000..7a8faf6fb7a
--- /dev/null
+++ b/docs/developer/plugins/ioam.rst
@@ -0,0 +1 @@
+../../../src/plugins/ioam/ioam_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/lacp.rst b/docs/developer/plugins/lacp.rst
new file mode 120000
index 00000000000..4d410243a8b
--- /dev/null
+++ b/docs/developer/plugins/lacp.rst
@@ -0,0 +1 @@
+../../../src/plugins/lacp/lacp_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/lb.rst b/docs/developer/plugins/lb.rst
new file mode 120000
index 00000000000..de3183a8b44
--- /dev/null
+++ b/docs/developer/plugins/lb.rst
@@ -0,0 +1 @@
+../../../src/plugins/lb/lb_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/lcp.rst b/docs/developer/plugins/lcp.rst
new file mode 120000
index 00000000000..2fbbe1f4db6
--- /dev/null
+++ b/docs/developer/plugins/lcp.rst
@@ -0,0 +1 @@
+../../../src/plugins/linux-cp/lcp.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/lldp.rst b/docs/developer/plugins/lldp.rst
new file mode 120000
index 00000000000..b913eca926c
--- /dev/null
+++ b/docs/developer/plugins/lldp.rst
@@ -0,0 +1 @@
+../../../src/plugins/lldp/lldp_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/map_lw4o6.rst b/docs/developer/plugins/map_lw4o6.rst
new file mode 120000
index 00000000000..427f189082e
--- /dev/null
+++ b/docs/developer/plugins/map_lw4o6.rst
@@ -0,0 +1 @@
+../../../src/plugins/map/map_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/marvell.rst b/docs/developer/plugins/marvell.rst
new file mode 120000
index 00000000000..28f0cd0f664
--- /dev/null
+++ b/docs/developer/plugins/marvell.rst
@@ -0,0 +1 @@
+../../../src/plugins/marvell/README.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/mdata.rst b/docs/developer/plugins/mdata.rst
new file mode 120000
index 00000000000..87e5c929bc4
--- /dev/null
+++ b/docs/developer/plugins/mdata.rst
@@ -0,0 +1 @@
+../../../src/plugins/mdata/mdata_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/nat44_ei_ha.rst b/docs/developer/plugins/nat44_ei_ha.rst
new file mode 120000
index 00000000000..a8a00f40218
--- /dev/null
+++ b/docs/developer/plugins/nat44_ei_ha.rst
@@ -0,0 +1 @@
+../../../src/plugins/nat/nat44-ei/nat44_ei_ha_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/nat64.rst b/docs/developer/plugins/nat64.rst
new file mode 120000
index 00000000000..22c6bbea80d
--- /dev/null
+++ b/docs/developer/plugins/nat64.rst
@@ -0,0 +1 @@
+../../../src/plugins/nat/nat64/nat64_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/pnat.rst b/docs/developer/plugins/pnat.rst
new file mode 120000
index 00000000000..4a8da6ef31a
--- /dev/null
+++ b/docs/developer/plugins/pnat.rst
@@ -0,0 +1 @@
+../../../src/plugins/nat/pnat/pnat.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/quic.rst b/docs/developer/plugins/quic.rst
new file mode 120000
index 00000000000..ffe53429571
--- /dev/null
+++ b/docs/developer/plugins/quic.rst
@@ -0,0 +1 @@
+../../../src/plugins/quic/quic_plugin.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srtp.rst b/docs/developer/plugins/srtp.rst
new file mode 120000
index 00000000000..51013cce036
--- /dev/null
+++ b/docs/developer/plugins/srtp.rst
@@ -0,0 +1 @@
+../../../src/plugins/srtp/srtp_plugin.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/ad_flow_plugin_doc.rst b/docs/developer/plugins/srv6/ad_flow_plugin_doc.rst
new file mode 120000
index 00000000000..f944884a992
--- /dev/null
+++ b/docs/developer/plugins/srv6/ad_flow_plugin_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-ad-flow/ad_flow_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/ad_plugin_doc.rst b/docs/developer/plugins/srv6/ad_plugin_doc.rst
new file mode 120000
index 00000000000..46ec8a8899e
--- /dev/null
+++ b/docs/developer/plugins/srv6/ad_plugin_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-ad/ad_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/am_plugin_doc.rst b/docs/developer/plugins/srv6/am_plugin_doc.rst
new file mode 120000
index 00000000000..842426adc54
--- /dev/null
+++ b/docs/developer/plugins/srv6/am_plugin_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-am/am_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/as_plugin_doc.rst b/docs/developer/plugins/srv6/as_plugin_doc.rst
new file mode 120000
index 00000000000..90dd28e6606
--- /dev/null
+++ b/docs/developer/plugins/srv6/as_plugin_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-as/as_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/index.rst b/docs/developer/plugins/srv6/index.rst
new file mode 100644
index 00000000000..eb8f3e815a2
--- /dev/null
+++ b/docs/developer/plugins/srv6/index.rst
@@ -0,0 +1,16 @@
+.. _dplugins_srv6:
+
+============
+SRv6 Plugins
+============
+
+.. toctree::
+    :maxdepth: 2
+
+    ad_flow_plugin_doc
+    ad_plugin_doc
+    am_plugin_doc
+    as_plugin_doc
+    mobile_plugin_doc
+    runner_doc
+    srv6_sample_localsid_doc
diff --git a/docs/developer/plugins/srv6/mobile_plugin_doc.rst b/docs/developer/plugins/srv6/mobile_plugin_doc.rst
new file mode 120000
index 00000000000..546f5f2cc14
--- /dev/null
+++ b/docs/developer/plugins/srv6/mobile_plugin_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-mobile/mobile_plugin_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/runner_doc.rst b/docs/developer/plugins/srv6/runner_doc.rst
new file mode 120000
index 00000000000..16217038309
--- /dev/null
+++ b/docs/developer/plugins/srv6/runner_doc.rst
@@ -0,0 +1 @@
+../../../../src/plugins/srv6-mobile/extra/runner_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/srv6/srv6_sample_localsid_doc.rst b/docs/developer/plugins/srv6/srv6_sample_localsid_doc.rst
new file mode 120000
index 00000000000..db924565db4
--- /dev/null
+++ b/docs/developer/plugins/srv6/srv6_sample_localsid_doc.rst
@@ -0,0 +1 @@
+../../../../src/examples/srv6-sample-localsid/srv6_sample_localsid_doc.rst
\ No newline at end of file
diff --git a/docs/developer/plugins/wireguard.rst b/docs/developer/plugins/wireguard.rst
new file mode 120000
index 00000000000..3cba6b438c3
--- /dev/null
+++ b/docs/developer/plugins/wireguard.rst
@@ -0,0 +1 @@
+../../../src/plugins/wireguard/README.rst
\ No newline at end of file