MFH: r360659

Fix installation with the WEBUI option enabled.

PR:		191610
Submitted by:	mtomasek4@gmail.com

Approved by:	portmgr (erwin)
Make sysutils/pstree operable in jailed environment.

(cherry picked from commit 0aa00da618ffa2bc5b4c4f8b89be22b9df2e9936)
Fixed replacement of $(PGBOUNCER_RUNDIR) in files/pgbouncer.in