nickserv/restrict: Do not allow unmarking no longer registered names.

Apparently, too much was copied from nickserv/mark.
chanfix: Fix log message about forced registration despite low score.

Reported by ShutterQuick.
Fixed not showing NOGREET
Merge branch 'master' of github.com:atheme/atheme
saslserv/dh-blowfish: generate a new keypair (but not a new prime) for each authentication session

surprise, surprise!  the openssl documentation lies.
calling DH_generate_key() will not replace the keypair, so we have to clone the DH structure to avoid
calculating a prime for each authentication.
Implement DH-AES scheme.

This is intended to be the successor to DH-BLOWFISH.
Minor cleanup
Fix a misspelling of Mr. Schneider's last name.
Update atheme.conf.example to add ECDSA-NIST256p-CHALLENGE.
Add the actual loadmodule line. :p
Add DH-AES support to cap_sasl.pl

I'm too lazy/grief stricken over my cat dying to bother with
ECDSA-NIST256p-CHALLENGE. Sorry.
operserv/sqline: use C99 boolean for module unload capability instead of old TRUE/FALSE
dbverify: fix stringref cleanliness issue found by clang
Clarified documentation on Chanserv flags and the sync command.

A chanserv sync command requires flag +R, but the documentation does not specify that. Mended this.
Merge pull request #143 from quora-wings/master

Clarified ChanServ documentation about flag +R
DH-AES: Minor optimisations and comment cleanups
Update libmowgli-2 snapshot for OS X fixes
Documentation tweak
Update docs for DH-AES
Fixed more warnings