On the fsx branch:  Mark FSX as "experimental" in its docstring. No functional change.
On the fsx branch:  Mark FSX as "experimental" in its docstring.
No functional change.

* subversion/include/svn_fs.h
  (SVN_FS_TYPE_FSX): expand docstring.

Suggested by: danielsh

git-svn-id: 026f9b73522f9155a890511228a8616f56eeddef@1509593 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion