Explicitly set serial port to 8N1

Surely nobody uses anything else...

src/syncterm/modem.c

@@ -164,6 +164,22 @@ modem_connect(struct bbslist *bbs)
 				return -1;
 			}
 		}
+		if (!comSetParity(com, false, false)) {
+			if (!bbs->hidepopups)
+				uifcmsg("Cannot Set Parity", "`Cannot Set Parity`\n\n"
+				    "Cannot open the specified serial device.\n");
+			conn_api.terminate = -1;
+			comClose(com);
+			return -1;
+		}
+		if (!comSetBits(com, 8, 1)) {
+			if (!bbs->hidepopups)
+				uifcmsg("Cannot Set Data Bits", "`Cannot Set Data Bits`\n\n"
+				    "Cannot open the specified serial device.\n");
+			conn_api.terminate = -1;
+			comClose(com);
+			return -1;
+		}
 		if (bbs->conn_type == CONN_TYPE_SERIAL_NORTS)
 			comLowerRTS(com);
 		if (!comRaiseDTR(com)) {