Revert CI deduplication on Wercker / Azure for debugging

CI seems to have a weired behavior now. Debugging.

Revert "azure-pipelines.yml: Fix typo"

This reverts commit f69d28fbca.

Revert "azure-pipelines.yml: Use simpler trigger syntax"

This reverts commit 709756d897.

Revert "azure-pipelines.yml: Do not run CI on trunk"

This reverts commit bec877b46f.

Revert "appveyor.yml: Do not doubly run CI on trunk"

This reverts commit d9b338a53f.

appveyor.yml

@@ -3,9 +3,6 @@ version: '{build}'
 shallow_clone: true
 platform:
   - x64
-branches:
-  except:
-    - trunk # mirrored master runs CI
 environment:
   ruby_version: "24-%Platform%"
   zlib_version: "1.2.11"

azure-pipelines.yml

@@ -1,6 +1,4 @@
 pr: none # comment out this line if you need to test this file on PR
-trigger:
-  - master
 jobs:
 - job: Linux
   pool: