Deprecate last remaining module from std.c and move it to druntime
fix findRoot
std.complex: clean imports
std.numric: clean imports
Merge pull request #2659 from 9il/iclean2

std.complex: clean imports
Remove EArrayInit as it's no longer needed
Merge pull request #2658 from 9il/iclean1

std.numeric: clean imports
Merge pull request #2660 from MetaLang/remove-put-EArrayInit

Remove EArrayInit as it's no longer needed
Merge pull request #2639 from 9il/findroot

fix Issue 13662: @safe pure nothrow @nogc findRoot
Fix wrong unittests for std.conv.unsigned, signed
Use immutable integer to demonstrate removed qualification
Merge pull request #2662 from ntrel/signed-test

Fix wrong unittests for std.conv.unsigned, signed
Merge pull request #2652 from joakim-noah/move_winsock

Deprecate last remaining module from std.c and move it to druntime