Log Message:
Update to 2.0
> o Major version bump to celebrate that Oinkmaster has now turned 5
>   years old!
> o When using the -U argument to merge new variables, you can now also
>   specify -S <file> to specify which files in the downloaded rules
>   archive(s) to search for new variables. If -S is not specified, only
>   snort.conf is searched, just like before. As usual, no variable
>   merge is done unless -U is specified. You may specify multiple
>   -S <file> arguments to search for variables in multiple files, e.g.
>   "... -S snort.conf -S foo.conf ...".
> o Handle multi-line variable definitions when merging variables.
> o Obfuscate the oinkcode when printing URLs, unless running in verbose
>   mode.
> o Added ability to grab rules files from a local directory by
>   specifying dir://<directory> as URL.
> o Suppress warnings about using modifysid on non-existent SIDs when
>   running in quiet mode.
> o Added some modifysid sanity checks
> o Added Q33 to the FAQ on how to disable all rules by default and
>   only activate specific ones, with example how to automatically
>   update only a few selected rules from Bleeding Snort.
> o Other documentation updates.
> o Misc improvements to the config file parser.
> o You can now set the HTTP User-Agent header string for Oinkmaster by
>   specifying "user_agent = ..." in oinkmaster.conf. The default
>   User-Agent string is unchanged, i.e. the string that LWP or wget set
>   it to by default. Based on patch from Derek Edwards.
> o Make contrib/addmsg.pl handle some multi-line statements.
> o contrib/create-sidmap.pl:
>   - don't ignore rules that are commented out
>   - ignore the file deleted.rules by default (you don't use it, do you?!)