Passing a value that contains special characters (e.g., `=`) causes
phpfpm to be unable to parse the configuration file.
As per PHP's parse_ini_file function documentation [1], all values
containing non-alphanumeric characters must be enclosed in double
quotes:
> If a value in the ini file contains any non-alphanumeric characters it
> needs to be enclosed in double-quotes (").
This commit ensures string values are enclosed in double-quotes, and
appropriately escapes double-quotes, backslashes, and line breaks.
[1]: https://www.php.net/parse_ini_file
Diogo Correia
f309829221