added --alarm-segfault
airbrake plugin
Merge pull request #253 from prymitive/alarm_airbrake_plugin

airbrake plugin
new api functions for http headers
improved url encoding api
added the WebDAV plugin (beta)
added xattr plugin
added PROPFIND + xattr in the webdav plugin
completed PROPPATCH
prepare for webdav locking
windows-webdav compatibility fix
support for OSX in the webdav plugin
added support for OSX xattr in WebDAV plugin
toward programmable webdav, carddav support ensured
added current-user-privilege-set
prepare for caldav support
send only requested webdav props
added a simple dumper for REPORT method