http://www.berklix.com/~jhs/src/bsd/fixes/FreeBSD/src/gen/etc/services.jabber.REL=CURRENT.diff
By { 12.0-ALPHA8 & 12.1-RELEASE & 2018-11-06 13.0-CURRENT } 
etc/services had moved to usr.sbin/services_mkdb/services

See also: ../../etc/services.jabber.REL=8.4-RELEASE.diff

# *** 13.0-CURRENT/src/usr.sbin/services_mkdb/services	Tue Nov 25 03:59:29 2008
# --- new/src/usr.sbin/services_mkdb/services	Sun Nov 11 22:28:35 CET 2018
# ***************
# *** 2269,2278 ****
# --- 2290,2303 ----
#   aol-3		5193/udp   #AmericaOnline3
#   xmpp-client	5222/tcp   #XMPP Client Connection
#   xmpp-client	5222/udp   #XMPP Client Connection
# + # jabber-client 5222/tcp   #Jabber Client Connection
# + # jabber-client 5222/udp   #Jabber Client Connection
#   padl2sim	5236/tcp
#   padl2sim	5236/udp
#   xmpp-server	5269/tcp   #XMPP Server Connection
#   xmpp-server	5269/udp   #XMPP Server Connection
# + # jabber-server	5269/tcp   #Jabber Server Connection
# + # jabber-server	5269/udp   #Jabber Server Connection
#   hacl-hb		5300/tcp   # HA cluster heartbeat
#   hacl-hb		5300/udp   # HA cluster heartbeat
#   hacl-gs		5301/tcp   # HA cluster general services

# *** 13.0-CURRENT/src/usr.sbin/services_mkdb/services	Tue Nov 25 03:59:29 2008
# --- new/src/usr.sbin/services_mkdb/services	Sun Nov 11 22:28:35 CET 2018
# ***************
# *** 1928,1937 ****
# --- 1928,1937 ----
#   aol-3		5193/udp   #AmericaOnline3
#   xmpp-client	5222/tcp   #XMPP Client Connection
#   xmpp-client	5222/udp   #XMPP Client Connection
# + # jabber-client 5222/tcp   #Jabber Client Connection
# + # jabber-client 5222/udp   #Jabber Client Connection
#   padl2sim	5236/tcp
#   padl2sim	5236/udp
#   xmpp-server	5269/tcp   #XMPP Server Connection
#   xmpp-server	5269/udp   #XMPP Server Connection
# + # jabber-server	5269/tcp   #Jabber Server Connection
# + # jabber-server	5269/udp   #Jabber Server Connection
#   hacl-hb		5300/tcp   # HA cluster heartbeat
#   hacl-hb		5300/udp   # HA cluster heartbeat
#   hacl-gs		5301/tcp   # HA cluster general services:

*** 13.0-CURRENT/src/usr.sbin/services_mkdb/services	Sat Feb 29 11:10:06 2020
--- new/src/usr.sbin/services_mkdb/services	Sat Mar 28 12:53:01 2020
***************
*** 1920,1929 ****
--- 1920,1933 ----
  aol-3		5193/udp   #AmericaOnline3
  xmpp-client	5222/tcp   #XMPP Client Connection
  xmpp-client	5222/udp   #XMPP Client Connection
+ # jabber-client	5222/tcp   #Jabber Client Connection
+ # jabber-client	5222/udp   #Jabber Client Connection
  padl2sim	5236/tcp
  padl2sim	5236/udp
  xmpp-server	5269/tcp   #XMPP Server Connection
  xmpp-server	5269/udp   #XMPP Server Connection
+ # jabber-server	5269/tcp   #Jabber Server Connection
+ # jabber-server	5269/udp   #Jabber Server Connection
  hacl-hb		5300/tcp   # HA cluster heartbeat
  hacl-hb		5300/udp   # HA cluster heartbeat
  hacl-gs		5301/tcp   # HA cluster general services