Cleanup: convenience library renaming

Cleanup: convenience library renaming

I have been trying to automate graphing of the Squid internal
dependencies. One of the major issues that has encountered is that some
of our convenience libraries use the '-' hyphen character which is a
reserved character in DOT graph format.

To make the scripts much simpler and the visual output reflect exactly
what the library names are this patch cleans up the libraries to follow
our pre-existing policy, and now also to remove punctuation from library
names. Which condition has been added to the guidelines documentation.