smtpd.conf(5)/table(5) manuals: change `\-' to `-'

Change smtpd.conf(5) and table(5) man pages to represent hyphen as plain `-'. According to mandoc_char(7), "[...] in manual pages just write plain `-' to represent hyphen, minus, and hyphen-minus." Found while comparing ssl(8), starttls(8), and smtpd.conf(5). Index: smtpd.conf.5

ssl(8): change example key size to 4096 bits

ssl(8) man page changed example key size from 2048 to 4096 in 2012 but reverted after two days. smtpd.conf(5)'s man page and acme-client both use 4096. is it time to un-revert? Index: ssl.8 === RCS file: /cvs/src/share/man/man8/ssl.

intro(3): DES replaced in libc

libc last supported DES on 6 Apr 2015. Index: intro.3 === RCS file: /cvs/src/share/man/man3/intro.3,v retrieving revision 1.87 diff -u -p -u -p -r1.87 intro.3 --- intro.3 5 Mar 2019 14:31:46 - 1.87 +++ intro.3 24 Ma

robots(6): unused score file

The score file was changed to $HOME three years ago. Index: Makefile === RCS file: /cvs/src/games/robots/Makefile,v retrieving revision 1.11 diff -u -p -u -p -r1.11 Makefile --- Makefile24 Nov 2015 03:10:10 - 1.11 +++ Mak