git-svn: apply "svn.pathnameencoding" before URL encoding

git-svn: apply "svn.pathnameencoding" before URL encoding

The conversion from "svn.pathnameencoding" to UTF-8 should be applied
first, and then URL encoding should be applied on the resulting UTF-8
path. The reversed order of these transforms (used before this fix)
makes non-UTF-8 URL which causes error from Subversion such as
"Filesystem has no item: '...' path not found" when sending a rename (or
a copy) from non-ASCII path.

[ew: t9115 test case added (requires SVN_HTTPD_PORT set to test),
 squash LC_ALL=$a_utf8_locale export from Kazutoshi for Cygwin]

Signed-off-by: Kazutoshi SATODA <k_satoda@f2.dion.ne.jp>
Signed-off-by: Eric Wong <normalperson@yhbt.net>