Remove an optimization for console io performance from a function which is used extensively from our fsfs backend for file io.
Remove an optimization for console io performance from a function which is
used extensively from our fsfs backend for file io.

r107229 made this function perform a separate write per 30 KByte on Windows,
while it can usually write everything at once. This also provides a better
behavior on write errors.

If we need better console performance we should move the console io to a
different function instead of slowing down all file io through this code
path.

* subversion/libsvn_subr/io.c
  (svn_io_file_write_full): Revert r1072299 to before r1072299, to make it
    use a single write operation in the common case where we write to a file.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1098728 13f79535-47bb-0310-9956-ffa450edef68

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