man*/: ffix (use `\%`)

man*/: ffix (use `\%`)

Protect instances of some literals from hyphenation.  These are only
those necessary to improve analyzability of a large-scale (500+ file),
sed-driven change to improve adjustment and hyphenation enablement
management around tables.

*  man2/getrlimit.2: Protect some instances of `RLIMIT_MSGQUEUE`,
   `RLIMIT_SIGPENDING`, `RLIMIT_FSIZE`, and `getrlimit` from
   hyphenation.
*  man2/sigaltstack.2: Protect an instance of `setrlimit` from
   hyphenation.
*  man3/gethostbyname.3: Protect an instance of `endhostent` from
   hyphenation.
*  man3/getmntent.3: Protect an instance of `getmntinfo` from
   hyphenation.

Signed-off-by: "G. Branden Robinson" <g.branden.robinson@gmail.com>
Signed-off-by: Alejandro Colomar <alx@kernel.org>