Sync SQL connect_timeout with default mysql.connect_timeout in PHP (60s).
Update docs/INSTALL.txt
Adjust spacing.
PHP: Better defaults for realpath_cache_ttl and realpath_cache_size in FPM/CLI.
Adjust spacing.
Update the logic for multi-version PHP support in docs/REMOTE.txt
PHP: Sync incorrect default_socket_timeout (60s) with max_execution_time (180s)
Update changelog.