Added the DosFileDirFullName fix to 3.7 (and 3.8alpha).  It seems to 
have been tested by a number of people, and deemed critical.

The Full 3.7 candidate image with this update is here:  
http://update.squeakfoundation.org/external/Squeak3.7-5989-full.zip

- Doug

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5989DosFileDirFullName-ar -- Andreas Raab -- 18 July 2004
Fix DosFileDirectory>>fullNameFor: to recognize drives and shares 
correctly. Also adds four more tests for DosFileDirectoryTests just in 
case...
18 July 2004 (nk): uncommented the commented-out code so that it would 
actually work.