wiki page won't be saved (and versioned) if no change is made to text
"wiki compression" default setting set to none
updated fixtures
changed from Zlib::GzipWriter/Zlib::GzipReader to Zlib::Inflate/Zlib::Deflate
added migrations for wiki
replaced cache hash key with a string
fixed mailer unit test
added some unit tests for wiki
patch #9104 Disable cleartext logging of passwords in log files
removed wiki page titles in html export
