NOCHANNELTOPIC: channel -> chanName

Update argument name (channel -> chanName) in NOCHANNELTOPIC for consistency.
Merge pull request #25 from gajop/patch-1

NOCHANNELTOPIC: channel -> chanName
add "p" compatibility flag (plain text agreement)
remove USERID / GENERATEUSERID / ACQUIREUSERID:

userid is already set on login!
-
clarify userid
add flobby identifiers
Documented the existing SAYPRIVATEEX commands