RDMF: use client instead of redisClient, like Disque.

src/slowlog.c

@@ -127,7 +127,7 @@ void slowlogReset(void) {
 
 /* The SLOWLOG command. Implements all the subcommands needed to handle the
  * Redis slow log. */
-void slowlogCommand(redisClient *c) {
+void slowlogCommand(client *c) {
     if (c->argc == 2 && !strcasecmp(c->argv[1]->ptr,"reset")) {
         slowlogReset();
         addReply(c,shared.ok);