Declare all configuration parameters in optlist.h. Remove some

redundant declarations elsewhere.

src/lib/commands/disa.c

@@ -34,11 +34,11 @@
 #include <fcntl.h>
 #include "misc.h"
 #include "commands.h"
+#include "optlist.h"
 
 int
 disa(void)
 {
-    extern s_char *disablefil;
     int fd;
 
     if ((fd = open(disablefil, O_RDWR | O_CREAT | O_TRUNC, 0660)) < 0)

src/lib/commands/enab.c

@@ -35,12 +35,11 @@
 #include <fcntl.h>
 #include "misc.h"
 #include "commands.h"
+#include "optlist.h"
 
 int
 enab(void)
 {
-    extern s_char *disablefil;
-
     (void)unlink(disablefil);
     pr("Updates are enabled\n");
     return RET_OK;

src/lib/commands/mobu.c

@@ -55,7 +55,6 @@ mobupdate(void)
     extern int updating_mob;
     struct mob_acc_globals timestamps;
     long now;
-    extern s_char *timestampfil;
 
     if (!opt_MOB_ACCESS) {
 	pr("Command invalid - MOB_ACCESS is not enabled.\n");

src/lib/commands/turn.c

@@ -35,14 +35,13 @@
 #include "player.h"
 #include "tel.h"
 #include "commands.h"
+#include "optlist.h"
 
 #include <fcntl.h>
 
 int
 turn(void)
 {
-    extern s_char *upfil;
-    extern s_char *downfil;
     int fd;
     struct telstr tgm;
     register s_char *p;

src/lib/commands/upda.c

@@ -37,7 +37,6 @@
 #include "player.h"
 #include "commands.h"
 #include "optlist.h"
-
 #include "keyword.h"
 #include "wantupd.h"
 
@@ -51,7 +50,6 @@ upda(void)
     FILE *fp;
     struct mob_acc_globals timestamps;
     extern int updating_mob;
-    extern s_char *timestampfil;
 
     if (opt_MOB_ACCESS) {
 #if !defined(_WIN32)