the newsgroup name. if the name is too long for the native file
system, use the hash function to come up with a new name.
move that has code out of xp_hash.c and into newsSummarySpec.cpp
in 4.x, this was the only place it was used anyways.
fix my debugging printf.
re-arrange addressbook makefiles in mailnews/makefiles so that people
who use obj-dir can build.