[dev] improvements on Auth LDAP driver

[Amith Varghese]

| Btw, Amith, it looks like you copied/pasted your patches into the one file
| you
| attached? The paths were off; it wanted all 3 files to be in the same dir.
| Also, there was a syntax error in the hooks.php.dist patch, looked to be
| caused
| by line wrapping.

Sorry... it's been a while since I wrote any code and submitted a patch :)  I
didn't copy and paste, but I did go into each folder and do a cvs diff rather
than staying at the top level and using relative paths.... I'll remember it for
next time.

Thanks
Amith