OpenIndiana Distribution

There's the following weirdness in configure(.ac) that makes us use man(5) one and it's rendered badly anyway:

        *solaris*)
                { $as_echo "$as_me:${as_lineno-$LINENO}: result: sunos" >&5
$as_echo "sunos" >&6; }
                PLATFORM=sunos
                case `/usr/bin/nroff --version 2>&1` in
                        *GNU*)
                                # Solaris 11.4 and later use GNU groff.
                                MANFORMAT=mdoc
                                ;;
                        *)
                                # Solaris 2.0 to 11.3 use AT&T nroff.
                                MANFORMAT=man
                                ;;
                esac
                ;;

That nested case needs to go. While here, we might as well stop adding the useless noise to man page (download location and stuff).