Pull up following revision(s) (requested by christos in ticket #157):
	sys/netinet/tcp_output.c: revision 1.178
Avoid stack overflow when SACK and TCP_SIGNATURE are both present. Thanks
to Jonathan Looney for pointing this out.
Ticket #157
Pull up following revision(s) (requested by christos in ticket #158):
	usr.bin/ftp/fetch.c: revision 1.206
don't pay attention to special characters if they don't come from the command
line (from jmcneill)
Ticket #158