Clearcase on Windows: Document & validate that is given UNC paths for the view storage directory

Clearcase needs to use UNC paths for the view storage directory, if you don't use it, you get the following error.

2010-02-19 23:58:55,149 WARN  [InitialPinger1] fisheye.app com.atlassian.fisheye.clearcase.ClearCaseContext-handleProcessError - 
Error executing command (cleartool mkview -snapshot -tag fisheye -vws d:\path\toviews\fisheye.vws d:\path\toviews\fisheye.vws ) : 
Non-zero exit code: 1 cleartool: Error: storage directory must be in UNC style (e.g. \\host\share\...)

• http://www.ipnom.com/ClearCase-Commands/mkview.html

  -vws
  Specifies the location for the snapshot view storage directory. On Windows systems, this must be a UNC name.
  For information on using this option to create snapshot views for disconnected use, see the section, "Disconnected Use of Snapshot Views".
  We recommend that you use -stgloc rather than this option whenever possible.

We should probably validate the input better.