(empfile, teldir, motdfil, downfil, disablefil, telfil, annfil)

(empfile, teldir, motdfil, downfil, disablefil, telfil, annfil)
(banfil, authfil, timestampfil): Make file names relative to DATADIR.
(main): emp_server and files change to the data directory.  fairland
has to write newcap_script to the initial current directory, so it
keeps it and makes file names relative to DATADIR absolute.
(fixup_files): Nothing to do, remove.  This fixes the following bug:
fixup_files() formed file names by appending ep->name instead of the
base name of ep->file to datadir.  Thus, fixup_files() changed file
names even when datadir had the compiled-in value.  When emp_config()
couldn't open econfig, it failed to call fixup_files(), and different
file names got used.  Note that with this revision the file names
revert to the names used before fixup_files() was introduced.  Closes
#1146080.
(print_config): Printing file names as comments is not really useful,
remove.
(otherfiles, ofiles): Unused, remove.
(emp_config, main): Previously, pconfig had to call emp_config() even
when it didn't want to read econfig, just to run fixup_files().  This
is no longer necessary.  Simplify.