fixed authentication for crypt. crypt was using the wrong password for salt. the correct password is the one that is in the database, not the user supplied password.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1520 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9