Squashed 'external/toxcore/c-toxcore/' changes from b03b571272..3e05824b80

3e05824b80 refactor: Rename `out` parameters to `out_$something`.
0199c0f17f cleanup: apply the same scheme to types
aebbfabe26 cleanup: event length naming inconsistencies
2457125aa8 cleanup: align group send err enum order

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 3e05824b80eb9bee33e8254cba0780d84c522182

testing/BUILD.bazel

@@ -14,6 +14,7 @@ sh_test(
     args = ["$(locations %s)" % f for f in CIMPLE_FILES] + [
         "-Wno-boolean-return",
         "-Wno-callback-names",
+        "-Wno-enum-from-int",
         "+RTS",
         "-N4",
         "-RTS",