Update references for default branch rename

README.md

@@ -64,21 +64,21 @@ make it embeddable into any tool or language.
 
 ## Releases
 
-* The master branch is the current release and is considered stable at all
+* The main branch is the current release and is considered stable at all
   times.
 * New versions can be released as frequently as every two weeks (our sprint
   cycle). The only exception would be for a high priority patch.
 * All active work is flagged with the sprint milestone and tracked in the
   project dashboard.
 * New releases occur the day after the sprint finishes.
   * The version in the dev branch is updated
-  * The changes are merged into master
+  * The changes are merged into main
   * A new tag is created
 
 ## Contributions
 
 * All pull requests must be made against the dev branch, direct commits to
-  master are not permitted.
+  main are not permitted.
 * All non trivial contributions should start with an issue being filed (if it is
   a new feature please propose your design/approach before doing any work as not
   all feature requests are accepted).

docs/heka/output.md

@@ -417,5 +417,4 @@ following values:
 checkpoint to that specific message
 
 #### Example Kafka Output
-[kafka.lua](https://github.com/mozilla-services/lua_sandbox_extensions/blob/master/kafka/sandboxes/heka/output/kafka.lua)
-
+[kafka.lua](https://github.com/mozilla-services/lua_sandbox_extensions/blob/main/kafka/sandboxes/heka/output/kafka.lua)