Bump liberty, add consts to some arguments

degesch.c

@@ -3116,7 +3116,7 @@ formatter_parse_mirc (struct formatter *self, const char *s)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
 static void
-formatter_parse_nick (struct formatter *self, char *s)
+formatter_parse_nick (struct formatter *self, const char *s)
 {
 	// For outgoing messages; maybe we should add a special #t for them
 	// which would also make us not cut off the userhost part, ever
@@ -3156,7 +3156,7 @@ formatter_parse_nick (struct formatter *self, char *s)
 }
 
 static void
-formatter_parse_nick_full (struct formatter *self, char *s)
+formatter_parse_nick_full (struct formatter *self, const char *s)
 {
 	formatter_parse_nick (self, s);