Zap c_index() and c_rindex(). Bruce prefers these to implicitly convert

a const into a non-const as they do in libc.  I feel that defeating the
type checking like that quite evil, but that's the way it is.

sys/kern/kern_linker.c

@@ -345,7 +345,7 @@ linker_make_file(const char* pathname, void* priv, struct linker_file_ops* ops)
     int namelen;
     const char *filename;
 
-    filename = c_rindex(pathname, '/');
+    filename = rindex(pathname, '/');
     if (filename && filename[1])
 	filename++;
     else
@@ -993,7 +993,7 @@ linker_search_path(const char *name)
     enum vtype		type;
 
     /* qualified at all? */
-    if (c_index(name, '/'))
+    if (index(name, '/'))
 	return(linker_strdup(name));
 
     /* traverse the linker path */

sys/libkern/index.c

@@ -38,27 +38,19 @@
 
 char *
 index(p, ch)
-	char *p;
-	int ch;
-{
-	for (;; ++p) {
-		if (*p == ch)
-			return(p);
-		if (!*p)
-			return(NULL);
-	}
-	/* NOTREACHED */
-}
-
-const char *
-c_index(p, ch)
 	const char *p;
 	int ch;
 {
-	for (;; ++p) {
-		if (*p == ch)
-			return(p);
-		if (!*p)
+	union {
+		const char *cp;
+		char *p;
+	} u;
+
+	u.cp = p;
+	for (;; ++u.p) {
+		if (*u.p == ch)
+			return(u.p);
+		if (!*u.p)
 			return(NULL);
 	}
 	/* NOTREACHED */

sys/libkern/rindex.c

@@ -38,31 +38,20 @@
 
 char *
 rindex(p, ch)
-	char *p;
-	int ch;
-{
-	char *save;
-
-	for (save = NULL;; ++p) {
-		if (*p == ch)
-			save = p;
-		if (!*p)
-			return(save);
-	}
-	/* NOTREACHED */
-}
-
-const char *
-c_rindex(p, ch)
 	const char *p;
 	int ch;
 {
-	const char *save;
+	union {
+		const char *cp;
+		char *p;
+	} u;
+	char *save;
 
-	for (save = NULL;; ++p) {
-		if (*p == ch)
-			save = p;
-		if (!*p)
+	u.cp = p;
+	for (save = NULL;; ++u.p) {
+		if (*u.p == ch)
+			save = u.p;
+		if (!*u.p)
 			return(save);
 	}
 	/* NOTREACHED */

sys/sys/libkern.h

@@ -73,10 +73,8 @@ int	 locc __P((int, char *, u_int));
 void	 qsort __P((void *base, size_t nmemb, size_t size,
 		    int (*compar)(const void *, const void *)));
 u_long	 random __P((void));
-char	*index __P((char *, int));
-char	*rindex __P((char *, int));
-const char *c_index __P((const char *, int));
-const char *c_rindex __P((const char *, int));
+char	*index __P((const char *, int));
+char	*rindex __P((const char *, int));
 int	 scanc __P((u_int, const u_char *, const u_char *, int));
 int	 skpc __P((int, int, char *));
 void	 srandom __P((u_long));