irc.py: rename the parsed object from 'Line' to 'Frame'
irc.py: fix bugs in input/output parsing

- ensure that formatted input/output is bytes
- fix tag separator
irc.py: inherit exception from more specific type
irc.py: fix odd "starts with ':': ..." message
add `pacman-verify` (half-baked tool to check sha256sums)
README: clean up, un-markdown
some random updates to IRC tests
README: mention more stuff
putty-hostalias.py: nuke

I don't think I've used this in the past four years.
fsu: nuke

I don't think I've used this in the past *five* years.  Or, actually, I
don't think I've used this ever at all; this is the never-finished
attempt at a "clean" Perl rewrite.
denettalk: move to security/
README: update
timestamp: nuke

It's a mere four-liner and it still took me a while to understand its
purpose. Apparently it sneaked in along with kprop.ssh – running
`timestamp foo.db kprop` only runs kprop if 'foo.db' is newer than the
last-run timestamp 'foo.db.time', and – screw it, I'll just write it
again if I _ever_ need it.
kprop.ssh: nuke

Collecting dust for three years. OpenLDAP multi-master replication is
the new cool thing.
denettalk: try the 8 most-common keys first

I thought it couldn't be worse. It was.