There appear to be bugs in the WiX firewall extension that causes errors on
install/upgrade in some scenarios (seemingly where existing fw exceptions for
Moonlight exist as in #1309).
Since a firewall exception really only provides minimal benefits for us in the
default configuration of Windows Firewall (outgoing: allow, incoming: deny) due
to WFP's stateful treatment of solicited unicast/multicast UDP traffic, let's
allow it to silently fail and not abort the whole installation.
Cameron Gutman
a6e549471c