Added minor changes for Linux manual flashing

Sonoff-DIY.md

@@ -42,7 +42,7 @@ As Sonoff DIY is enabled by connecting GPIO16 to GND it may well be possible tha
 - Power off the device and remove DIY jumper as it is no longer needed and might interfere with future Tasmota features that use GPIO16
 
 ## Manual Flash
-This procedure is recommended for MacOS.  
+This procedure is recommended for MacOS, but also works for Linux.  
 ### Requirements
 - eWelink firmware updated to at least 3.1
 - OS with `curl` and `mDNS` discovery tool
@@ -55,6 +55,8 @@ This procedure is recommended for MacOS.
 - Local web server  
   Upload the firmware file to a web server available on the same local network
   
+  Very simple webservers (like python SimpleHTTPServer) will not work.
+
 ### Verify and/or update eWelink firmware version
 - Open the device and remove the jumper labeled OTA if present
 - Power on device and connect to eWelink
@@ -67,7 +69,7 @@ This procedure is recommended for MacOS.
   - Password: `20170618sn`
 - Wait for the Sonoff device to connect
 - Obtain the device IP address (search on the router or perform an IP scan)
-- Using the `dns-sd` command, search for the mDNS details. In this example, the device ID is **_1000988699_**
+- Using the `dns-sd` (MacOS) or `avahi-browse` (Linux) command, search for the Zeroconf details. In this example, the device ID is **_1000988699_**
 ~~~~
   $ dns-sd -B _ewelink._tcp  
   Browsing for _ewelink._tcp  
@@ -77,6 +79,7 @@ This procedure is recommended for MacOS.
   20:19:31.957  Add        2   5 local.               _ewelink._tcp.       eWeLink_1000988699  
 ~~~~
 
+
 ### Flash the firmware and confirm
 - Test with /zeroconf/info POST:  
   >$ curl http://_\<deviceIP>_:8081/zeroconf/info -XPOST --data '{"deviceid":"1000988699","data":{} }'