Add a command line argument for excluding servers

[osa1]

Currently we use command line arguments as servers to connect, so, if I run tiny with tiny foo bar I only connect to servers that have foo or bar in their names (e.g. irc.foo.net). But I currently have 5 servers in my .tinyrc, and sometimes I don't want to connect to one of them. Instead of listing other 4 servers it'd be easier to list just one to exclude. Maybe something like tiny -x foo to NOT connect to server foo.