Bug 520151 - Error when modifying userPassword with proxy user
Resolves: bug 520151
Bug description: Error when modifying userPassword with proxy user
Fix description: The acl_access_allowed() has been modified to
call aclplugin_preop_common() which will initialize the aclpb.
The aclplugin_preop_common() has been modified to check for the
ACLPB_INITIALIZED flag to avoid re-initializing aclpb.
Reviewed by: rmeggins (and pushed by)
(cherry picked from commit 742032c11f0dabbdc80ba204801c27c4cbe305a4)