[3.0]Fix the RTSP server timeout which stops the playback of the RTSP stream

You can find more information on the issue #25812 (closed).

The issue is not present on the master branch, so I wanted to discover which changes fixes the issue and port them to the 3.0.x branch.

Using the git bisect I discovered that the commit ce3269d4, httpd: set timeout duration per host rather than client fixes the issue.

So I back-ported this commit and the commit 2fd2b843, httpd: store timeout date rather than activity date as well which I believe is needed which also states that it does not make any functional changes.

Please review. Let me know if you need something else.

Thanks,

Stavros