BGP: Make TCP listener VRF aware

[taktv6]

root@debian:/home/takt# ./bio-rd 
INFO[0000] Reloading configuration                      
INFO[0000] Listener manager: Starting TCP listener on [::]:179 in VRF main 
INFO[0000] Listener manager: Starting TCP listener on 0.0.0.0:179 in VRF main 

root@debian:/home/takt# ss -tlpen | grep 179
LISTEN 0      128          0.0.0.0:179        0.0.0.0:*    users:(("bio-rd",pid=527,fd=12)) ino:13294 sk:2a cgroup:/user.slice/user-1000.slice/session-3.scope <->         
LISTEN 0      128             [::]:179           [::]:*    users:(("bio-rd",pid=527,fd=11)) ino:13293 sk:2e cgroup:/user.slice/user-1000.slice/session-3.scope v6only:1 <->

[taktv6]

I guess this needs synchronization. To be addressed by me.

[taktv6]

Done.

[codecov-commenter]

Codecov Report

Merging #407 (4dbf9fb) into master (8269abc) will increase coverage by 0.17%.
The diff coverage is 41.07%.

@@            Coverage Diff             @@
##           master     #407      +/-   ##
==========================================
+ Coverage   55.13%   55.31%   +0.17%     
==========================================
  Files         147      146       -1     
  Lines        7674     7669       -5     
==========================================
+ Hits         4231     4242      +11     
+ Misses       3247     3229      -18     
- Partials      196      198       +2     

Flag	Coverage Δ
unittests	55.31% <41.07%> (+0.17%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
protocols/bgp/server/fsm.go	27.17% <0.00%> (ø)
routingtable/vrf/vrf_registry.go	67.56% <ø> (ø)
protocols/bgp/server/server.go	18.69% <20.00%> (+1.41%)	⬆️
protocols/bgp/server/bgp_api.go	58.62% <53.84%> (-4.54%)	⬇️
protocols/bgp/server/peer_manager.go	91.66% <77.77%> (-8.34%)	⬇️
protocols/bgp/server/peer.go	3.07% <100.00%> (+0.99%)	⬆️

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[BarbarossaTM]

LGTM