(config_tables): New econfig key.
(read_config_tables): New, implements config_tables.
(main): Call it. Need to call ef_init() and chdir(configdir) first.
(ef_init_srv): Don't call ef_init(), since main() did it already.
Remove old way to do the same:
(ef_load): Remove, along with calls.
(empfile): Set configuration tables' member file back to NULL.
(show_nuke_capab, vers, xdvisible, build.t, Options.t):
Remove opt_DRNUKE and replace with the following check
drnuke_const > MIN_DRNUKE_CONST.
Set MIN_DRNUKE_CONST to 0.001 to prevent issues with tiny values.
Change the default drnuke_const to 0.0 because in the stock game
opt_DRNUKE was disabled.
(player_init): Implement it.
(player_init): Support service name in econfig key loginport. Service
empire no longer takes precedence over econfig. Closes#797096.
(emp_config, print_config): Cope with km_type.
(worldxset, intset, floatset, optstrset, doubleset, longset): Unused,
remove.
(emp_config): Fail if specified file can't be read or contains errors.
Used to succeed always, returning RET_OK. RET_OK is not appropriate,
since this is not a command. Return 0 on success, -1 on failure.
Callers ignore failure at the moment. A missing or unreadable econfig
file used to be silently ignored. It is still ignored, but no longer
silently. It is questionable whether ignoring is wise, but that's
left for another day.
(emp_config): Improve diagnostic messages.
(set_option): Move diagnostics to caller.
(emp_config): Ignore leading whitespace in `#' comment lines.
(print_config): Simplify printing of km_comment.
(set_option): New parameter val, so it can set and clear options.
(delete_option): Remove.
(KM_ALLOC): Turn macro into enumeration constant.
(KM_INTERNAL): New.
(xdump, xdver): New version dump.
(keymatch, infodir, datadir, teldir, upfil, downfil, disablefil,
telfil, annfil, banfil, timestampfil, privname, privlog, update_times,
update_demandtimes, game_days, game_hours): Use plain char * instead
of s_char * for strings, void * for generic pointers.
