#69 Adding IPV6 support to mp3rtp utility

[Surabhi]

Currently mp3rtp utility of LAME supports only IPV4 communication.
I have done changes to rtp_socket() and lame_main() functions so that both IPV4 and IPV6 addresses can be supported.
One change for usage of mp3rtp utility would be that now the input will be taken as below:
arecord -b 16 -s 22050 -w | ./mp3rtp 224.17.23.42 5004:2 -b 56 - /dev/null
and
arecord -b 16 -s 44100 -w | ./mp3rtp ff00::8 5004:2 -b 56 - /dev/null

So, using this patch mp3rtp can multicast data on IPV6 address also.
By default IPV6 is enabled and can be disabled using --disable-ipv6 with configure.

These changes will add advantage to use mp3rtp in both IPV4 and IPV6 mode.
Using only IPV4 could be a limitation very soon and upgradation to support both IPV4 and IPV6 is important.
Please find the patch attached for this change.

[Surabhi]

Hello,

I have updated the IPV6 support patch with corrections done for few indentation errors and improving variable names.
Please find updated patch attached.

Thanks.

[Alexander Leidinger]

Commited. There were some changes since then, so parts had to be applied by hand. I did some very very light testing. Can you test?