[rdiff-backup-users] --include-globbing-filelist-stdin not documented

[Michael Johnson]

I was having problems trying to figure out a good way to make 
rdiff-backup work with my existing rsync file lists, but rdiff backup 
wants the full path while rsync lets you leave off the prefix you 
specify as the source.  While playing around with this I stumbled across 
the --include-globbing-filelist-stdin which allowed me to pull this off 
without having to write a filelist to disk.  I'm just sort of curious if 
there is a specific reason this option is not documented.  I'm using 1.0.3.

Thanks!