Fix davautocheck.sh failures caused by looking for mod_dav_svn.so in invalid location.  Add authentication directives to httpd configuration for lock-tests in 'make davautocheck'.
Fix davautocheck.sh failures caused by looking for mod_dav_svn.so
in invalid location.  Add authentication directives to httpd
configuration for lock-tests in 'make davautocheck'.

Patch by: Vivek C. <vivek@collab.net>
          VK Sameer <sameer@collab.net>
(Tweaked by me.)
Review by: Markus Rückert <darix@web.de>
           Max Bowsher <maxb@ukf.net>

* subversion/tests/clients/cmdline/davautocheck.sh
  Docstring fixes.
  (APXS): variable for apxs (value may be from --with-apxs)
  (HTPASSWD): new variable for htpasswd
  (HTTPD): modified to use apxs to locate httpd
  (HTTPD_CFG): add authentication directives for locking tests
  (HTTPD_USERS): new password file variable
  (get_loadmodule_config): use apxs to find LIBEXECDIR instead of
  hard-coding Apache modules directory

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion