Requests monitoring for a directory and all contained files.
A FAM event will be generated whenever the status of the directory (i.e.
the result of function stat() on that directory) or its
content (i.e. the results of readdir()) changes.
The possible event codes are described in detail in the
constants part of this section.
A resource representing a connection to the FAM service returned by
Path to the monitored directory
Returns a monitoring resource or
FALSE on errors.