error message formating fixes. It is better to use two array_push calls.

error message formating fixes. It is better to use two array_push calls.
password don't match error message is added only when $msgs array is empty.
(no internal script errors).

blowfish fixes. hardcoded use of second blowfish version with specified
number of rounds. code is experimental. similar test worked on openbsd 3.5
and openbsd crypt.3 does not provide enough information about format of salt.

suppressed ldap_modify error messages, because modification errors are
checked in script.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@8964 7612ce4b-ef26-0410-bec9-ea0150e637f0