"t" is a nonportable way of opening files in text mode. Windows
opens files in text mode by default anyway, and in UNIX there is
no text mode. (Passing "t" to fopen is undefined in standard C.)
fatalerror() prints a given string to stdout and exits(5). It
cannot format text, so there was a string temptext used with
sprintf() to format text and pass it to fatalerror().
errx() can format text, and it prints to stderr.
As a bonus, this fixes the linking warnings from use of sprintf().
Merging lai's source with this one is very irritating because
they have different indentation styles. I couldn't find what profile
vegard used for his version, so I used these flags (which should bring
the source close to KNF):
-bap
-br
-ce
-ci4
-cli0
-d0
-di0
-i8
-ip
-l79
-nbc
-ncdb
-ndj
-ei
-nfc1
-nlp
-npcs
-psl
-sc
-sob
