firewalld: allow interface names containing '-'

Previously, interface names could only contain alphanumerics.

BUG=none
TEST=ran iptables unit tests

Change-Id: I19951389f7fef54f74568592f6988fd5da1b164b
Reviewed-on: https://chromium-review.googlesource.com/255152
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Aaron Kemp <kemp@google.com>
Commit-Queue: Aaron Kemp <kemp@google.com>
2 files changed