vtysh running-config output not showing bgp ttl-security hops option

[cgoncalves]

Describe the bug

[x] Did you check if this is a duplicate issue?
[ ] Did you test it on the latest FRRouting/frr master branch?

BGP configuration option neighbor PEER ttl-security hops NUMBER not displayed in vtysh show running-config output.

Although the configuration is not displayed, it is being set per the BGP daemon log:
2021/01/11 14:56:26 BGP: peer_ttl_security_hops_set: set gtsm_hops to 1 for uplink

Documentation: http://docs.frrouting.org/en/latest/bgp.html#clicmd-[no]neighborPEERttl-securityhopsNUMBER

To Reproduce

1. Set ttl-security hops in frr.conf. Example:

hostname ctrl-3-0
log file /var/log/frr/frr.log debugging
service integrated-vtysh-config
line vty

router bgp 64999
  bgp log-neighbor-changes
  bgp graceful-shutdown

  neighbor uplink peer-group
  neighbor uplink remote-as internal
  neighbor uplink bfd
  neighbor uplink ttl-security hops 1
  neighbor enp2s0 interface peer-group uplink
  neighbor enp3s0 interface peer-group uplink

  address-family ipv4 unicast
    redistribute connected
    neighbor uplink allowas-in origin
  exit-address-family

  address-family ipv6 unicast
    redistribute connected
    neighbor uplink activate
    neighbor uplink allowas-in origin
  exit-address-family

2. Start FRR with the BGP daemon enabled.
3. Check running configuration in vtysh:

[root@ctrl-3-0 frr]# vtysh -c 'show running-config'
Building configuration...

Current configuration:
!
frr version 7.5
frr defaults traditional
hostname ctrl-3-0
log file /var/log/frr/frr.log
no ipv6 forwarding
!
router bgp 64999
 bgp log-neighbor-changes
 bgp graceful-shutdown
 neighbor uplink peer-group
 neighbor uplink remote-as internal
 neighbor uplink bfd
 neighbor enp2s0 interface peer-group uplink
 neighbor enp3s0 interface peer-group uplink
 !
 address-family ipv4 unicast
  redistribute connected
  neighbor uplink allowas-in origin
 exit-address-family
 !
 address-family ipv6 unicast
  redistribute connected
  neighbor uplink activate
  neighbor uplink allowas-in origin
 exit-address-family
!
line vty
!
end

Expected behavior
I would have expected to see an output line with neighbor uplink ttl-security hops 1.

Versions

• OS Version: RHEL 8.3
• Kernel: Linux 4.18.0-240.el8.x86_64
• FRR Version: 7.5