Further tvbuffication from Ronnie Sahlberg.

Further tvbuffication from Ronnie Sahlberg.

Get rid of a bunch of stuff for which said tvbuffication removes the
need.

When dissecting byte parameters, make sure you don't consume more bytes
than the byte count, and handle captures where the last string in the
byte parameters area isn't properly null-terminated (I think I've seen
that in packets from various versions of Windows NT).

Make various bitfields given as decimal in SMB specs decimal.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@4172 f5534014-38df-0310-8fa8-9805f1628bb7