Comment 4 for bug 1481261

Ideally we should normalize MACs in a nice way. For example, if I copy/paste, sometimes I get cruft like:

90: 2b: 34: dc: 7e: 9d

As long as it has an appropriate number of hex digits, we should accept it. Some software also outputs MACs in the format:

0:b:34:dc:7e:9d

Note the 8-bit values less than 16 which are not zero-padded. (ugh)

So I guess if separators exist, we should first zero-fill the digits appropriately.

Note, that also means this is a "valid" MAC:

aaaaaaaaaaaa

(but only because there are exactly 12 'a's.) I could see us also accepting "aaaaaaaaaaa" (0a:aa:aa:aa:aa:aa).