=head2 get_usertag
my %ut = get_usertag('don@donarmstrong.com','this-bug-sucks','eat-this-bug');
+ my %ut = get_usertag('don@donarmstrong.com');
Returns a hashref of bugs which have the specified usertags for the
user set.
+In the second case, returns all of the usertags for the user passed.
+
=cut
use Debbugs::User qw(read_usertags);