Add command to update rules

[techtonik]

Would be nice to have an option to update the rules to the latest version. I just submitted a PR upstream and it would be nice to use it with wad if approved.

[i-sylar]

is there an option to suppress/skip "[Errno 104] connection reset by peer" as to avoid the script crashing?

[techtonik]

@i-sylar please give more details.