pidgin security and bug fix update

2.5.2-6 - Automatically detect booleans to enable build features from dist tag - Unify RHEL4 and RHEL5 spec with Fedora to make both easier to maintain 2.5.2-2 - Upstream backports: 100: sametime-redirect-null crash 101: NetworkManager-improvement 102: no-password-in-dialog-if-not-remembering 103...