MFH: r369347

Update to patchlevel 26. This is a NOP as r369261 already covered it.
Make sysutils/pstree operable in jailed environment.

(cherry picked from commit 0aa00da618ffa2bc5b4c4f8b89be22b9df2e9936)
Fixed replacement of $(PGBOUNCER_RUNDIR) in files/pgbouncer.in
Revert "Define and use "our_gid" variable."
Startup script now supports multiple profiles.

(cherry picked from commit bc186548d5f9d1b53d58e9abc5e39f7d916dba91)
(cherry picked from commit f7276b8fda49456743b97046b9f8ed6fb22cc8e2)