I stumbled upon this when scouring through /opt/thinlinc/bin in search for user-visible tools. There is no documentation for tl-while-x11 in the TAG. To make matters worse, there is no --help option for the program either. While the name tl-while-x11 is somewhat self-explanatory, it would be nice to see some documentation that explains how to use it and if the tool takes any options.
From internal chat:
Should consider maybe moving it to libexec instead/aswell. In this case, the script would only be for internal use. This would in turn mean that the need for documentation is less.
We've decided this is an internal mechanism and should therefore be moved out of bin/.