Restoring everything through PhpMyAdmin makes it working.
I noticed two things:
Based on tutorial- https://premium.wpmudev.org/forums/topic/how-to-change-url-for-wp-multi-site?fbc=b&utm_expid=3606929-104.UORT_bNFTQmA2CgLFPRuGg.1&utm_referrer=https%3A%2F%2Fwww.google.co.in%2F , It is must to include trailing slash for URL under wp-options, wp-sitemeta and wp_blogid_options. it was not already added.
So, also, as I again change http:// to https:// the same 403 forbidden error starts appearing. I checked the error log. It is something like this: 2017/05/09 16:30:53 [error] 7326#0: *49 limiting requests, excess: 1.790 by zone “one”, client: 117.96.7.183, server: domain.com, request: “GET /wp-login.php HTTP/1.1”, host: “www.domain.com” 2017/05/09 16:30:56 [error] 7326#0: *49 limiting requests, excess: 1.791 by zone “one”, client: 117.96.7.183, server: domain.com, request: “GET /wp-login.php HTTP/1.1”, host: “www.domain.com” 2017/05/09 16:31:12 [error] 7326#0: *9 limiting requests, excess: 1.747 by zone “one”, client: 117.96.7.183, server: domain.com, request: “GET /wp-login.php HTTP/2.0”, host: “www.domain.com”