- Add patches to fix build on 10.x+

- Mark BROKEN on 10.x+

It accesses field of structure which was made opaque in r235647
to change internally used file descriptor:

cwd.c:892:15: error: incomplete definition of type 'struct _dirdesc'
    search->dp->dd_fd = squirrel_fd(search->dp->dd_fd);
    ~~~~~~~~~~^
/usr/include/dirent.h:58:8: note: forward declaration of 'struct _dirdesc'
struct _dirdesc;
       ^

This hack is no longer possible on 10.x+. Doscmd may work fine
without it though, but I'm not taking responsibility by blindly
removing it. If you know the interlans and can test it, see
extra-patch-cwd.c.

emulators/doscmd/Makefile

@@ -23,6 +23,11 @@ X11_MAKE_ARGS_OFF=	-DNO_X
 
 .include <bsd.port.options.mk>
 
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1000012
+# files/extra-patch-cwd.c will fix this, see inside
+BROKEN=		does not build (accesses field of opaque structure)
+.endif
+
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/${PORTNAME} ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_MAN} ${WRKSRC}/${PORTNAME}.1 ${STAGEDIR}${PREFIX}/man/man1