socat: Update to 0.0.12

pkgsrc changes:
- Remove hopefully no longer needed patch-fdname.c, Solaris support should be
  now properly handled by upstream too

Changes:
1.7.4.3
-------
Fixes the TCP_INFO issue that broke building on non-Linux platforms. Furthermore,
building on AIX works again. A few more corrections and improvements have been
added.

1.7.4.2
-------
Fixes a lot of bugs, e.g., for options -r and -R.

(leot)