de/re-code subject in native auto-reply
add explicit check for pthread support in glib
POP3: audit message retrieval and align with imap code
Properly unescape multiple backslash sequences
Increase max username length according to db schema

Mantis: http://www.dbmail.org/mantis/view.php?id=991
handle potential overflow
fix mempool regression
add new test script
IMAP: update new test-script
remove redudant call
remove redundant null check
coverity fixes at low and medium priority
cleanup regression from coverity fixes
IMAP: fix leak
add 8bit test strings to base-subject scanner
IMAP: always disable read-events during deferred cleanup