hash tables: now default to :equal-based.

* hash.c (eql_based_k): New keyword variable.
(equal_based_p): New static function.
(hashv): Use eql_based_p to determine whether to make an
equal-based hash table. Subject to opt_compat relative
to version 187.
(hash_init): Intern :eql-based keyword and store in new
variable.

* hash.h (eql_based_k, userdata_k): Declared.

* txr.1: Documentation updated, with compat notes too.

1 files changed, 1 insertions, 1 deletions

diff --git a/hash.h b/hash.h
index f5af5c0a..13c21a76 100644
--- a/hash.h
+++ b/hash.h
@@ -25,7 +25,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-extern val weak_keys_k, weak_vals_k, equal_based_k;
+extern val weak_keys_k, weak_vals_k, equal_based_k, eql_based_k, userdata_k;
 
 cnum equal_hash(val obj, int *count);
 val make_hash(val weak_keys, val weak_vals, val equal_based);