various: move const ptr indicator to return value

src/basic/cap-list.h

@@ -8,8 +8,8 @@
  * "0x", two bytes for the hex value, and one trailing NUL byte. */
 #define CAPABILITY_TO_STRING_MAX (2 + 2 + 1)
 
-const char *capability_to_name(int id);
-const char *capability_to_string(int id, char buf[static CAPABILITY_TO_STRING_MAX]);
+const char* capability_to_name(int id);
+const char* capability_to_string(int id, char buf[static CAPABILITY_TO_STRING_MAX]);
 #define CAPABILITY_TO_STRING(id) capability_to_string(id, (char[CAPABILITY_TO_STRING_MAX]) {})
 
 int capability_from_name(const char *name);