Closes #26269

Summary of Changes

Fix blatantly wrong code.

If connecting to redis using a sock Eg: /var/run/redis/redis.sock then Joomla should be transparently setting the port to 0 before connecting to redis.

$host[0] === '/' is checking if the first char in the string /var/run/redis/redis.sock is a / and if so should be setting the port to 0 - someone got the ?: wrong the wrong way and no one noticed :)

Testing Instructions

Provision a redis server correctly set up for socket connections though, say, /var/run/redis/redis.sock

Configure Joomla Global configuration to use Redis as a cache and session handler using the above sock (to match your server, not exactly the example /var/run/redis/redis.sock)

Actual result BEFORE applying this Pull Request

Joomla could not connect to redis over sock and would red screen of death or debugger message if debug mode on

Expected result AFTER applying this Pull Request

Joomla can now connect.

Documentation Changes Required

Paging @simbus82 @csthomas