Remove empty patch file. Regen distinfo, which also removes references
to two other patches that apparently no longer exist.
This version of nmh specifically needs terminfo and not termcap
Adjust accordingly and bump PKGREVISION.
nmh
nmh 1.6 was added recently.
The configure script checks for arc4random(), but the program uses
arc4random_buf(); netbsd-5 (and presumably earlier) has the one but
not the other. Just disable it, because all it's using the randomness
for is message-ids. Fixes the netbsd-5 build.
Second attempt at:

Fix build on systems which don't provide openat() such as NetBSD 6
https://bugzilla.gnome.org/show_bug.cgi?id=735974

after Joerg's failure report. Previous was tested on NetBSD 6 and 7. Not
so this time.