Protocol abbreviations should be all lower case, as they're used in

Protocol abbreviations should be all lower case, as they're used in
filter expressions, and names in those expressions are currently
case-sensitive, and obliging people to type "Lanman" to filter for
Lanman packets is overkill.

Get rid of the comment saying that the routines for mailslot and pipe
dissecting should perhaps be migrated to another file, as this and
"packet-smb-mailslot.c" are the other files to which they were migrated.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@1632 f5534014-38df-0310-8fa8-9805f1628bb7