Give macros and libraries names that imply that clean dissectors are the

Give macros and libraries names that imply that clean dissectors are the
normal case, and dissectors with warnings are the exception; the
ultimate goal is to have only clean dissectors.

Move a bunch of now-cleaned-up dissectors into the "clean" category.

Fix a comment.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@26096 f5534014-38df-0310-8fa8-9805f1628bb7