Do not use the "env" program, which Windows does not include.
Do not use the "env" program, which Windows does not include.

* contrib/client-side/psvn/psvn.el
  (svn-status-svn-environment-var-list): Don't mention the env program.
    Document a new feature: a string without an equals sign means remove
    that variable from the environment.  (If you were using env from GNU
    coreutils, this was already possible with "--unset=VARIABLE", but
    that was never documented here.)
  (svn-process-environment): New function.
  (svn-run-svn): Bind process-environment instead of running the env program.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@857035 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion