Fix a few more compiler warnings.

arogue5/mdport.c

@@ -666,7 +666,7 @@ md_killchar(void)
  *	Print a readable version of a certain character
  */
 
-char *
+const char *
 md_unctrl(char ch)
 {
 #if USG5_0

arogue5/util.c

@@ -839,7 +839,7 @@ secretdoor(int y, int x)
 void
 strucpy(char *s1, char *s2, int len)
 {
-    register char *sp;
+    const char *sp;
 
     while (len--)
     {

arogue7/mdport.c

@@ -647,7 +647,7 @@ md_killchar(void)
  *	Print a readable version of a certain character
  */
 
-char *
+const char *
 md_unctrl(char ch)
 {
 #if USG5_0

arogue7/util.c

@@ -1181,7 +1181,7 @@ str_compute(void)
 void
 strucpy(char *s1, char *s2, int len)
 {
-    register char *sp;
+    const char *sp;
 
     while (len--)
     {

arogue7/xcrypt.c

@@ -57,6 +57,9 @@
 #endif
 #define _PASSWORD_EFMT1 '_'
 
+unsigned long int md_htonl(unsigned long int x);
+unsigned long int md_ntohl(unsigned long int x);
+
 static unsigned char	IP[64] = {
 	58, 50, 42, 34, 26, 18, 10,  2, 60, 52, 44, 36, 28, 20, 12,  4,
 	62, 54, 46, 38, 30, 22, 14,  6, 64, 56, 48, 40, 32, 24, 16,  8,

srogue/options.c

@@ -234,7 +234,7 @@ parse_opts(char *str)
 void
 strucpy(char *s1, char *s2, int len)
 {
-	reg char *sp;
+	const char *sp;
 
 	while (len-- > 0) {
 		strcpy(s1, (sp = unctrl(*s2)));

urogue/mdport.c

@@ -53,6 +53,7 @@
 #include <utmpx.h>
 #endif
 
+#include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -724,7 +725,7 @@ md_killchar()
  *	Print a readable version of a certain character
  */
 
-char *
+const char *
 md_unctrl(char ch)
 {
 #if USG5_0

xrogue/util.c

@@ -1204,7 +1204,7 @@ str_compute(void)
 void
 strucpy(char *s1, char *s2, int len)
 {
-    register char *sp;
+    const char *sp;
     while (len--)
     {
         strcpy(s1, (sp = unctrl(*s2)));