Configure for stdeb.cfg.
Added benchmark.
Update depends.
Pep8 fix.
Set binary transfer mode.
Fixed send size.
Simple bench for login.
Merge branch 'upstream/master'

Conflicts:
	setup.py
Merge remote-tracking branch 'origin/master'
Added new option 'session_timeout' for control who long we must keep idle ftp connect.
Merge branch 'upstream/master'

Conflicts:
	swftp/ftp/service.py
Try to fix leak.
Added debug counter for ftp_PASV and ftp_PORT.
Debug output to file.
Fixed DTP socket leaks.
Remove debug info.
Fixed DTP socket leaks.
Deny CWD to no existing path by default but added option to control it.
Fixed swftp.swift.UnAuthorized: 403 Forbidden (https://jira.selectel.org/browse/STORAGE-1167)
ignore special flags for command LIST