Fix parsing of TTL "labels" to isolate the value
Fix parsing of TTL "labels" to isolate the value

In TTL, labels are contained in quotes, and these will sometimes have a
language encoding following them, e.g. '@en'. This commit takes care of
the common cases we've dealt with so far, but we probably need to think
of a better solution soon

gtfierro/hod,gtfierro/hod,gtfierro/hod,gtfierro/hod,gtfierro/hod,gtfierro/hod