I get this exception when Phragment is uploading a file to S3:
```
PhabricatorS3FileStorageEngine: S3Exception: S3::putObject(): [RequestTimeout] Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.' in /srv/phabricator/phabricator/src/applications/files/storage/PhabricatorFile.php:250
```
Various internet links based on Googling that might help:
- http://stackoverflow.com/questions/6072666/requesttimeout-uploading-to-s3-using-php
- http://omegadelta.net/2011/12/21/s3-php-putobject-timeout-for-small-files-fix-provided/