rogue4: fix most GCC5 warnings.

Converting all function definitions to ANSI style accounts for most of
the change.  This has exposed other problems, such as daemons not
actually being their stated type, that will require more careful
solutions.

rogue4/mdport.c

@@ -59,6 +59,7 @@
 char *strdup(const char *s);
 #endif
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
@@ -465,7 +466,7 @@ md_getrealname(int uid)
 #endif
 }
 
-extern char *xcrypt(char *key, char *salt);
+extern char *xcrypt(const char *key, const char *setting);
 
 char *
 md_crypt(char *key, char *salt)
@@ -1046,6 +1047,7 @@ md_readchar(WINDOW *win)
     int mode2 = M_NORMAL;
     int nodelayf = 0;
     int count = 0;
+    extern void auto_save(int sig);
 
     for(;;)
     {