trunk: Always use ./tmp/sessions for session.save_path #2411

in r4654, always use local tmp/sessions folder; Zend_Session::start() fails when session.save_path = "N;/path"

this also got rid of an ugly if(condition).

Not going to try and make N;/path work because it supposedly has a side-effect of turning off session file garbage collection (which could lead to inode exhaustion) on an improperly configured server.

See #1279