This patch should not be necessary, except under unusual circumstances.
Perhaps it is necessary for the GDBM, but NDBM (whose code is nearly
identical) does not need it.

	/Matti Aarnio - 1.Dec.1997

--- router/libdb/gdbm.c~	Wed Nov 26 18:24:18 1997
+++ router/libdb/gdbm.c	Mon Dec  1 09:18:34 1997
@@ -105,7 +105,6 @@
 	conscell *tmp;
 	struct spblk *spl = NULL;
 	int retry, i;
-	spkey_t symid;
 
 	retry = 0;
 
@@ -120,8 +119,7 @@
 	val = gdbm_fetch(db, key);
 	if (val.dptr == NULL) {
 		if (!retry && gdbm_errno) {
-			gdbm_close(db);
-			sp_install(symid, (u_char *)NULL, 0, spt_files);
+			close_gdbm(sip);
 			++retry;
 			goto reopen;
 		}
--- router/libdb/ndbm.c~	Mon Dec  1 09:11:11 1997
+++ router/libdb/ndbm.c	Mon Dec  1 09:19:18 1997
@@ -75,7 +75,6 @@
 	conscell *tmp;
 	struct spblk *spl;
 	int retry, i;
-	spkey_t symid;
 	char *us;
 
 	retry = 0;
@@ -92,13 +91,13 @@
 	if (val.dptr == NULL) {
 #ifdef HAVE_DBM_ERROR
 	  if (!retry && dbm_error(db)) {
-	    dbm_close(db);
+	    close_ndbm(sip);
 	    ++retry;
 	    goto reopen;
 	  }
 #else
 	  if (!retry && errno != 0) {
-	    dbm_close(db);
+	    close_ndbm(sip);
 	    ++retry;
 	    goto reopen;
 	  }