net/samba413: Mark DEPRECATED and set EXPIRATION_DATE

Samba 4.13 has already reached its EoL on March 21, 2022. The main
reason this port isn't removed yet is that Samba 4.16 (net/samba416)
doesn't work with FreeBSD 12. So mark DEPRECATED and set
EXPIRATION_DATE to December 31, 2023, the EoL day of FreeBSD 12.

PR:		267142
Approved by:	maintainer timeout

net/samba413/Makefile

@@ -12,6 +12,9 @@ WWW=				https://www.samba.org/
 LICENSE=			GPLv3+
 LICENSE_FILE=			${WRKSRC}/COPYING
 
+DEPRECATED=	Reached its EoL on March 21, 2022
+EXPIRATION_DATE=	2023-12-31
+
 IGNORE_NONTHREAD_PYTHON=	needs port lang/python${PYTHON_SUFFIX} to be build with THREADS support
 CONFLICTS_INSTALL?=		samba4* # bin/cifsdd bin/dbwrap_tool bin/dumpmscat bin/findsmb bin/gentest