MFC r257583, r258012, r258013:

 r257583 (peter):
 Remove the WITH_LIBICONV_COMPAT hack that seems to do more harm
 than good.  This caused libc to spoof the ports libiconv namespace
 and provide a colliding libiconv.so.3 to fool rtld.  This should
 have been removed some time ago.

 r258012:
 Remove WITH_LIBICONV_COMPAT file to chase after r257583.

 r258013:
 Regenerate src.conf.5 after removal of WITH_LIBICONV_COMPAT.

Approved by:	re (kib)
Sponsored by:	The FreeBSD Foundation

Sponsored by:	The FreeBSD Foundation