1. First check svn version and module used command
$ svn --version
2. If not include ra_serf module, please download newer subversion package.
3. decompress subversion package. use command download ra_serf module.
$ tar zxvf subversion-1.9.2.tar
$ cd subversion-1.9.2
$ sh get-deps.sh serf
$ ./configure
$ make
$ make install
4. Check again svn module, have ra_serf module.
$ svn --version
5. Finish, you can access HTTP or HTTPS repository.
ps. purple color is input command.
