#53 Add mtime Feature for sr_poll

[Eric Funk]

Currently sr_poll just loops through a directory, Compares the results with its cache and does a post on the difference. We have encountered issues where sr_poll is polling a file that hasn't fully been transferred into the directory. The notification is posted and a sr_sarra instance may grab the incomplete file.

Metpx sundew receivers have an 'mtime' feature where you can specify how old a file must be (i.e. the time since it last has been written to) before being collected. This feature would be nice to have in sr_poll as well.

In addition some files come in and have umasks to restrict permissions before the file has been transferred, however sr_poll will still poll these files and post them. Ignoring those files would be beneficial as well.

[psilva]

option should actually be called inflight. see sr_watch for usage.

[psilva]

could do this with a do_line that examines the ''minute'' display on the remote site (time stamp only goes to minutes, not seconds.)

[psilva]

done. in 2.17.12 or something...

[psilva]

now: https://github.com/MetPX/sarracenia/issues/34