Serialize client initialization to prevent race conditions.
[XrdCl] Return an error when no correct response to kXR_dirlist was received
[XrdCl] Warn about partial reponses by printing to std::cerr
[XrdCl] Actually cancell the JobManager threads while stopping it
[XrdCl] Abort when trying to get an element from empty synced queue
[XrdCl] Cast the utilization statistics to uint16_t before printing
[XrdCl] Improve handling of malformed kXR_readv responses
[XrdCl] Info about checking if third-party copy is supported is printed at Debug level not Error
[XrdCl] Set message description whenever client debug is enabled (clearer trace messages)
[Man] Explain parameters of xrdcopy --tpc
Restore original meaning of -adler and -md5 to xrdcp. These are legacy
options that always locally computed the checksum and printed it.