[PATCH] Allow specifying the keepalive interval

Cherry-pick commit 011f709 from hiredis, to expose
redisEnableKeepAliveWithInterval

src/hiredis/hiredis.c

@@ -911,11 +911,13 @@ int redisSetTimeout(redisContext *c, const struct timeval tv) {
     return REDIS_ERR;
 }
 
+int redisEnableKeepAliveWithInterval(redisContext *c, int interval) {
+    return redisKeepAlive(c, interval);
+}
+
 /* Enable connection KeepAlive. */
 int redisEnableKeepAlive(redisContext *c) {
-    if (redisKeepAlive(c, REDIS_KEEPALIVE_INTERVAL) != REDIS_OK)
-        return REDIS_ERR;
-    return REDIS_OK;
+    return redisKeepAlive(c, REDIS_KEEPALIVE_INTERVAL);
 }
 
 /* Set a user provided RESP3 PUSH handler and return any old one set. */

src/hiredis/hiredis.h

@@ -298,6 +298,7 @@ int redisReconnect(redisContext *c);
 redisPushFn *redisSetPushCallback(redisContext *c, redisPushFn *fn);
 int redisSetTimeout(redisContext *c, const struct timeval tv);
 int redisEnableKeepAlive(redisContext *c);
+int redisEnableKeepAliveWithInterval(redisContext *c, int interval);
 void redisFree(redisContext *c);
 redisFD redisFreeKeepFd(redisContext *c);
 int redisBufferRead(redisContext *c);