Re: add recovery, backup, archive, streaming etc. activity messages to server logs along with ps display

A bunch of these now execute snprintf()s unnecessarily.  I think these
should be made conditional on message_level_is_interesting(DEBUG1) to
avoid that overhead.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
"You're _really_ hosed if the person doing the hiring doesn't understand
relational systems: you end up with a whole raft of programmers, none of
whom has had a Date with the clue stick."              (Andrew Sullivan)