Switch back to master fork of Mediawiki LDAPProvider

[m1cr0man]

I have forked and extended LDAPProvider to add gidNumber resolution so we can use group-based privileges.

https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/LDAPProvider/+/559951/

When this is merged the LDAPProvider github fetch will need to be switched back.

[theycallmemac]

@m1cr0man has this been merged in?

[m1cr0man]

Nope, it was broken in the end. I need to submit another gerrit change.