/etc/rc.subr is not available on Darwin

[Adam <adam%netbsd.org@localhost>]

Hello,

This change to databases/postgresql16-server/files/pgsql.sh makes the file unusable on Darwin where /etc/rc.subr is not available. 

--- files/pgsql.sh 17 Sep 2023 08:53:22 -0000 1.1
+++ files/pgsql.sh 5 Oct 2023 21:11:36 -0000 1.2
@@ -18,9 +18,7 @@
 # pgsql_home="/path/to/home" # path to pgsql database directory
 # See postmaster(1) for possible options.
  -if [ -f /etc/rc.subr ]; then
- . /etc/rc.subr
-fi
+$_rc_subr_loaded . @SYSCONFBASE@/rc.subr


I guess more files are affected.

Please revert or fix,
Adam