Follow-up to r1435746:  Improve docstrings for verify-related functions.
Reorder parameters of svn_fs_verify to "general, notify, cancel, pools".

* subversion/include/svn_fs.h
  (svn_fs_verify): improve docstring; reorder parameters

* subversion/libsvn_fs_fs/fs_fs.h
  (svn_fs_fs__verify): improve docstring; reorder parameters
  (svn_fs_fs__verify_rev): improve docstring

* subversion/libsvn_fs_base/fs.c
  (base_verify): update

* subversion/libsvn_fs_fs/fs.c
  (fs_verify): update

* subversion/libsvn_fs_fs/fs_fs.c
  (svn_fs_fs__verify):  update

* subversion/libsvn_fs/fs-loader.c
  (svn_fs_verify): update

* subversion/libsvn_fs/fs-loader.h
  (fs_library_vtable_t): update

* subversion/libsvn_repos/dump.c
  (svn_repos_verify_fs2): update

Suggested by: julianfoad

git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1439210 13f79535-47bb-0310-9956-ffa450edef68