fixes Issue 9054 - std.net.curl byLineAsync and byChunkAsync broken.
Fix12609 - Remove dead code assignment.
fix Issue 12394 - Regression: std.regex unittests take agonizingly long to run - like hours on OSX
Merge pull request #2098 from WalterBright/fix12394

fix Issue 12394 - Regression: std.regex unittests take agonizingly long ...
Fix Issue 12608 - Avoid dead assignments.
Merge pull request #2097 from AndrejMitrovic/Fix12609

[Trivial] Fix12609 - Remove dead code assignment.
Merge pull request #2096 from AndrejMitrovic/Fix12608

[Trivial] Issue 12608 - Avoid dead assignments.
Merge pull request #2086 from tcsc/master

fixes Issue 9054 - std.net.curl byLineAsync and byChunkAsync broken.