Hi!

Two issues reported by Nicolas Joly:

1. When the argument for .Sx is not quoted and contains a space, it
breaks the link. Example attached. The .Sx links differ as follows:
the one without the quotes has "20" in a place where the other has
"x20x". Shouldn't the argument of .Sx be taken as one item independent
on if it has quotes or not?

2. The header for man pages generated with mandoc doesn't have
"NetBSD" in the center. Example:
njoly@petaure [~]> nroff -mandoc /usr/share/man/man4/multicast.4 | head -n 1
MULTICAST(4)            NetBSD Kernel Interfaces Manual           MULTICAST(4)
njoly@petaure [~]> mandoc -Tascii /usr/share/man/man4/multicast.4 | head -n 1
MULTICAST(4)               Kernel Interfaces Manual               MULTICAST(4)
Not a biggy, but why not leave it as before? :)

Cheers,
 Thomas