webapp does not listen on ::1

[vladak]

trying to send config to localhost revealed that webapp is not listening on ::1

$ nc -v localhost 2424
nc: connect to ::1 port 2424 [host localhost] (tcp) failed: Connection refused
Connection to localhost 2424 port [tcp/*] succeeded!

Also, the -U option of Indexer should be able to accept IPv6 addresses which currently does not work given the code in sendToConfigHost() which splits the optarg with : delimiter. It should use proper notation as per RFC 2732.

[vladak]

I should've added that v6 is preferred on the system:

$ getent ipnodes localhost
::1	moose localhost localhost loghost
127.0.0.1	moose localhost localhost loghost

[vladak]

Made obsolete by #2184 (cset c1a21bc)