This works around a bug in libmagic since version 5.12 (current at
time of writing is 5.14) -- second call to magic_load() w/ non-default
database segfaults.
The framework now cycles through callbacks based on a table indexed
by analyzer tags, or the special case of service strings if a given
analyzer is overloaded for multiple protocols (FTP/IRC data). This
lets each protocol script bundle implement the callback locally and
reduces the FAF's external dependencies.
Added the file extraction action and did other misc. cleanup. Most of
the minimal core features/support for file analysis should be working at
this point, just have to start fleshing things out.
