Improve cast_ptr_alignment lint
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* print alignment in bytes in the lint message
* ignore ZST left-hand types
Fixes#3797 and #4256
changelog:
* `cast_ptr_alignment`: Print alignment in bytes in the lint message
* `cast_ptr_alignment`: Ignore casting from ZST left-hand types
Disable AppVeyor builds on the master branch
AppVeyor is already checked on every merge of a PR, rechecking it
immediately after on the master branch is not necessary.
Resolves#4263
changelog: none
Avoid reporting string_lit_as_bytes for long strings
Port of @jens1o code ([b76f939][jens1o_commit])
Fixes#1208
[jens1o_commit]: b76f939ac2
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changelog: bugfix for long strings as bytes
