Add util_ldap_cache_getuserdn() prototype to the util_ldap.h header file

                              const char *url, const char *basedn, int scope, char **attrs,

                              const char *filter, const char *bindpw, const char **binddn, const char ***retvals);

/**

 * Searches for a specified user object in an LDAP directory

 * @param r The request record

 * @param ldc The LDAP connection being used.

 * @param url The URL of the LDAP connection - used for deciding which cache to use.

 * @param basedn The Base DN to search for the user in.

 * @param scope LDAP scope of the search.

 * @param attrs LDAP attributes to return in search.

 * @param filter The user to search for in the form of an LDAP filter. This filter must return

 *               exactly one user for the check to be successful.

 * @param binddn The DN of the user will be returned in this variable.

 * @param retvals The values corresponding to the attributes requested in the attrs array.

 * @tip The filter supplied will be searched for. If a single entry is returned, an attempt

 *      is made to bind as that user. If this bind succeeds, the user is not validated.

 * @deffunc int util_ldap_cache_getuserdn(request_rec *r, util_ldap_connection_t *ldc,

 *                                          char *url, const char *basedn, int scope, char **attrs,

 *                                          char *filter, char **binddn, char ***retvals)

 */

LDAP_DECLARE(int) util_ldap_cache_getuserdn(request_rec *r, util_ldap_connection_t *ldc,

                              const char *url, const char *basedn, int scope, char **attrs,

                              const char *filter, const char **binddn, const char ***retvals);

/**

 * Checks if SSL support is available in mod_ldap

 * @deffunc int util_ldap_ssl_supported(request_rec *r)