Switch REVISION in preperation for tagging.

This is the last time we do this.  After 9.2.0-R
is out the door the build system will be adapted to
DTRT when building from a tag.
Add monthly_show_success="NO".

Without the setting the disabled 300.stastistics script monthly nags the user to
enable it -- it will generate an email containing:
---
Posting monthly OS statistics disabled
    set monthly_statistics_enable="YES" in /etc/periodic.conf
---
Add a PROVIDE line to ix-pbi so it actually runs

Ticket: #3747
Fix formatting slightly.
Fix "typo" introduced in 8b261d4e9761

Ticket:	#3754