Here is a list of all related documentation pages:

XRootD Development Model and How to Contribute
Building and Installing XRootD from Source Code
Configuring and Running XRootD tests with CTest
XrdClProxyPrefix Plugin
1 XrdClRecorder Plugin
CORS Plugin
HTTPS Third Party Copy for XRootD
Macaroon support for Xrootd
XrdOssCsi
XRootD OSS Stats
SciTokens Authorization Support for XRootD
XrdThrottle: Managing I/O load in XRootD
VOMS Mapping