added an option: 'Do not classify message as junk if sender is in the address book'
check the return value of junk filter command and show error dialog on failure.
optimized filter rule matching by modifying the order of condition matching.
Automatically select appropriate Junk folder on filtering.
fixed a bug that the value of <account-id> tag was not parsed correctly.
modified debug log for filter.
added debug log for filter.
fixed a bug that MIME flag was not set to filtered sent messages.
made default_addrbook_func static, and made 3.0beta8 release.
added a new filter match type: is (not) in addressbook.
libsylph: use itos_buf() because itos() is not thread-safe.
update summary caches on receiving.
disabled auto decrypt on filtering to avoid passphrase dialog. made 2.4.6 release.
win32: fixes renaming of folder didn't modify filter actions.
display error dialog if the execution of the junk filter command failed.
apply flag changes in IMAP automatic filtering.
fixed IMAP4 filtering when IP unreachable.
support Oniguruma for regex.
added filter conditions of status such as 'unread', 'mark', 'color-label', and 'mime'.
some modification of searching.
implemented query search and virtual folder (merged from newsearch branch).
added utility functions for optimization of filter.
fixed execution failure on filtering if a file path includes space.
changed the license of LibSylph from GPL to LGPL.
moved more modules to libsylph.
moved procmsg.c::procmsg_get_filter_keyword() to filter.c::filter_get_keyword_from_msg().
moved two functions from prefs_filter.c to filter.c.
moved prefs_filter_read_config() to filter.c.
separated UI code from prefs.c.
check for regex.h and regcomp().
modify filter rules after moving folders.
fixed a bug in syncing folder path.
integrated junk filter setting into common prefs.
fixed Turkish locale problem.
replaced intl.h with glib/gi18n.h.
Initial import of Sylpheed (GTK2 version).