Add Varien_Profiler starts/stops.
Remove profiler lines that may be referenced during PHP shutdown and cause errors.
Reduce "BREAK_MODULO" to increase speed of lock-breaking.
*struggles* Can't read code.. too many lines.. Uhhh..
Replace 'BREAK_MODULO' with checking if pid has changed when breaking lock for quicker lock breaking. Sleep 0.5 seconds instead of 1 second between lock attempts.
Merge remote-tracking branch 'upstream/master'

Sync with upstream.