Revert "Cleanup AbstractCommand"

This reverts commit 0465aa54557e802156d1df0661c29d2aadb5541d.
Revert "Cleanup HttpHeaderProcessor::parse"

This reverts commit 047b49b7a02f14c714360efd1f7fe20c33f5850d.
Cleanup HttpHeaderProcessor take 2

Decided to keep the 'if(' -> 'if (' stuff, as I formatted the whole file
and so it is internally consistent within the file. Also, too much
hassle.
Cleanup AbstractCommand take 2

Decided to keep the 'if(' -> 'if (' stuff, as I formatted the whole file
and so it is internally consistent within the file. Also, too much
hassle.
Consistent style in the platform TLS implementations
Consistent style in util_security
New round of clang-modernize
Silence deprecation warning about daemon() on OSX
Use _setmode to set binary mode in mingw

The _CRT_fmode stuff was never working correctly anyway, and is entirely
unsupported in mingw-w64 these days, it seems.