Also include extern references for optarg and optind since there is no
guarantee that any header file will include them. Standards? We don't
need no stinkin' standards
* Makefile.am: Use @GETOPT@ to pull in libiberty on those platforms that
need it.
armored key. (main): Accept "try-dns-srv" option.
* Makefile.am: Use @CAPLIBS@ to link in -lcap if we are using
capabilities. Use @SRVLIBS@ to link in the resolver if we are using DNS
SRV.