6tunnel-0.11

Changes by Wojtek Kaniewski:

• changed license to GPL version 2. There was no license information before which caused confusion. Code by Tomasz Lipski and awayzzz had to be removed, because their e-mail addresses were dead and googling for them gave no useful information. The missing features have been rewritten from scratch. If any offending code is still here, please let me know. I've done my best, but I haven't used any version control 5 years ago,
• changed e-mail address,
• ignore IPv4/IPv6 address hints when option -H is present.

Changes by Ramunas Lukosevicius:

• fixed source mapping bug,
• SIGHUP reloads map file.

Changes by Roland Stigge:

• fix an error in the "hints" handling of the host resolver which confused local/source and remote hint (AF_INET/AF_INET6).

Changes by Olaf Rempel:

• correct option -f.