use novendor param as flag for don't read vendro name, need for dexp ups

NEWS.adoc

@@ -213,6 +213,8 @@ Overall, NUT CI farm build times got 25%+ shorter (which is important as
      on Innova devices, but other models than RT 3/1. [#2798]
    * introduced a `gtec` subdriver and protocol, tested over USB with a
      Gtec ZP120N device. [#2818]
+   * fixed `hunnox_protocol()` to honour the optional `novendor` setting for
+     devices that are confused by such query, e.g. DEXP LCD EURO 1200VA. [#2839]
    * extended Voltronic protocol to support longer numbers as remaining
      `battery.runtime` value. [#2765]
 

UPGRADING.adoc

@@ -117,6 +117,11 @@ Changes from 2.8.2 to 2.8.3
   other devices using that MIB (negatively, if the older mappings were
   indeed correct for any practical cases, and were not a typo). [#2803]
 
+- `nutdrv_qx` fixed `hunnox_protocol()` to honour the optional `novendor`
+  setting for devices that are confused by such query (e.g. DEXP LCD EURO
+  1200VA); it may be remotely possible that some other devices could begin
+  to misbehave due to this fix -- please let us know then. [#2839]
+
 - mge-utalk driver will no longer set non-standard status values `COMMFAULT`
   and `ALARM` (for a specific status bit); instead, it will set modern
   `ups.alarm` with values `COMMFAULT` and/or `DEVICEALARM` (and raise

data/driver.list.in

@@ -329,6 +329,7 @@
 "Deltec"	"ups"	"4"	"PRM 450/700/1000/1500"	""	"upscode2"
 
 "DEXP"	"ups"	"2"	"MIX 850VA"	"USB"	"blazer_usb langid_fix=0x0409 runtimecal=240,100,720,50 default.battery.voltage.high=2.27 default.battery.voltage.low=1.72"	# https://github.com/networkupstools/nut/issues/721
+"DEXP"	"ups"	"2"	"LCD EURO 1200VA"	"USB"	"driver=nutdrv_qx port=auto vendorid=0001 productid=0000 product=MEC0003 langid_fix=0x0409 protocol=hunnox subdriver=hunnox novendor norating noscanlangid default.battery.voltage.high=28.6 default.battery.voltage.low=21.4"	# https://github.com/networkupstools/nut/pull/2839
 
 "Digital Loggers"	"pdu"	"1"	"LPC, EPCR2, DIN"	"8 outlets"	"powerman-pdu (experimental)"
 

docs/nut.dict

@@ -1,4 +1,4 @@
-personal_ws-1.1 en 3323 utf-8
+personal_ws-1.1 en 3324 utf-8
 AAC
 AAS
 ABI
@@ -245,6 +245,7 @@ DES
 DESTDIR
 DEVICEALARM
 DEVNAME
+DEXP
 DF
 DHEA
 DIGYS

drivers/nutdrv_qx.c

@@ -993,7 +993,7 @@ static int 	hunnox_protocol(int asking_for)
 			}
 			break;
 		case 3:
-			if (asking_for != 0x0c) {
+			if (asking_for != 0x0c && !testvar("novendor")) {
 				upsdebugx(3, "asking for: %02X", (unsigned int)0x0c);
 				usb_get_string(udev, 0x0c,
 					langid_fix_local, (usb_ctrl_charbuf)buf, 102);