feat: flip swap mechanism — MD as primary, RST as override (Phase 1)

This is the first of three phases inverting the per-page swap mechanism
so MD becomes the canonical primary and RST becomes the rare override.

Phase 1 — file renames + conf.py exclude_patterns flip only:
- Rename docs/**/md-<stem>.md to docs/**/<stem>.md (drop md- prefix)
  for all 254 stems previously listed in docs/_swap.txt
- Rename docs/**/<stem>.rst to docs/**/rst-<stem>.rst (add rst- prefix)
  for the same 254 stems
- Repurpose docs/_swap.txt as docs/_rst_overrides.txt; initially empty
  comment-only since no pages need the RST fallback right now
- conf.py exclude_patterns flipped: rst-*.rst is now excluded by default
  instead of md-*.md
- conf.py runtime-artifact references updated to _rst_override_state.json
  and _md_exclude.txt (Phase 2 will rewrite swap_sources.py to produce
  these names; for now no swap script runs because overrides list is empty)

Phase 2 (next commit on this branch) will rewrite scripts/swap_sources.py
with inverted rename direction, delete scripts/import_myst.py + tests, and
update tests/test_swap_sources.py for the new semantics.

Phase 3 will be the cleanup pass and ready-for-review flip.

Generated by robots https://vyos.io

1 files changed, 31 insertions, 0 deletions

diff --git a/docs/configuration/protocols/multicast.md b/docs/configuration/protocols/multicast.md
new file mode 100644
index 00000000..27150a29
--- /dev/null
+++ b/docs/configuration/protocols/multicast.md
@@ -0,0 +1,31 @@
+(routing-static)=
+
+# Multicast
+
+In order to influence Multicast {abbr}`RPF (Reverse Path Forwarding)` lookup,
+it is possible to insert into zebra routes for the Multicast
+{abbr}`RIB (Routing Information Base)`. These routes are only used for RPF
+lookup and will not be used by ZEBRA for insertion into the kernel or for
+normal RIB processing. As such it is possible to create weird states with
+these commands.
+
+Use with caution. Most of the time this will not be necessary.
+
+```{cfgcmd} set protocols static mroute \<subnet\> next-hop \<address\> [distance \<distance\>]
+
+Insert into the Multicast RIB Route `<subnet>` with specified next-hop.
+The distance can be specified as well if desired.
+```
+```{cfgcmd} set protocols static mroute \<subnet\> next-hop \<address\> disable
+
+Do not install route for `<subnet>` into the Multicast RIB.
+```
+```{cfgcmd} set protocols static mroute \<subnet\> interface \<interface\> [distance \<distance\>]
+
+Insert into the Multicast RIB Route `<subnet>` with specified `<interface>`.
+The distance can be specified as well if desired.
+```
+```{cfgcmd} set protocols static mroute \<subnet\> interface \<interface\> disable
+
+Do not install route for `<subnet>` into the Multicast RIB.
+```
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