treewide: move to main branch as default branch

CONTRIBUTING.md

@@ -30,7 +30,7 @@ as long and detailed as you wish.
 
 Signed-off-by: $YOUR_SIGNATURE
 ```
-You can add the signed-off-by line automatically via `git commit -s`. 
+You can add the signed-off-by line automatically via `git commit -s`.
 
 ## Any contributions you make will be under the GPLv3 Software License
 In short, when you submit code changes, your submissions are understood to be under the same [GPLv3 License](http://www.gnu.org/licenses/gpl-3.0.html) that covers the project. Feel free to contact the maintainers if that's a concern.

doc/compiling.md

@@ -64,4 +64,4 @@ Checking 'proper-umask'... ok.
 
 The script will download the OpenWrt-SDK for the specific architecture and compile all packages in the feed. This works for local packages, that aren't checked into git too.
 
-Please mind, that this will build the packagefeed, _but won't sign it_. Signing needs to be handled separately (i.e. automatic builds get signed on buildbot master).
+Please mind, that this will build the packagefeed, _but won't sign it_. Signing needs to be handled separately (i.e. automatic builds get signed on buildbot main).

doc/translation.md

@@ -10,7 +10,7 @@ to understand the rest of what we do here.
 
 ## get LuCI translation scripts
 
-Run `fetch_translation_tools.sh` once. It will download the current luci-translation scripts from master and place them in the `build` directory. Please don't commit them, as they might change. If you feel, that those scripts aren't up to date, just run that script again.
+Run `fetch_translation_tools.sh` once. It will download the current luci-translation scripts from main and place them in the `build` directory. Please don't commit them, as they might change. If you feel, that those scripts aren't up to date, just run that script again.
 
 ## prepare translation of a new app