Merge pull request #3753 from WalterBright/fix13102

[REG2.065] Issue 13102 - Cannot parse 184467440737095516153.6L
Merge pull request #3757 from 9rnsr/fix13114

Issue 13114 - old opCmp requirement for AA keys should be detected for classes
Merge pull request #3762 from 9rnsr/fix13132

[REG2.066a] Issue 13132 - ICE on interface AA key
Merge pull request #3735 from WalterBright/fix12989

fix Issue 12989 - Wrong x86_64 code for delegate return when compiled as...
Merge pull request #3739 from WalterBright/fix12989-2

2nd try at fix Issue 12989
Merge pull request #3765 from AndrewEdwards/2.066

Regression fixes for 2.066.0-b4
Merge pull request #3756 from schuetzm/fix-uninitialized-storage-class

Fix uninitialized variable
Merge pull request #3766 from 9rnsr/2.066

Cherry-picking commits from master to 2.066 branch (for beta4)
Merge pull request #3613 from WalterBright/hpohl-opt

Increase allocation chunk size + minor refactoring
Merge pull request #3745 from economicmodeling/coverage_test_case

Added test case for druntime pull request 830.
Merge pull request #3746 from Safety0ff/test7068

Add regression test for bug 7068.
Merge pull request #3737 from 9rnsr/fix11066

Issue 11066 - Spurious warning 'statement is not reachable' with -profile
Merge pull request #3734 from 9rnsr/fix13082

Issue 13082 - Spurious error message with failed call to class ctor
Merge pull request #3751 from lionello/fix13109

Issue 13109 - Show error on conflicting args -lib and -run
Merge pull request #3764 from 9rnsr/fix13131

Issue 13131 - [2.066-b3] dmd: glue.c:1492: unsigned int totym(Type*): Assertion `0' failed.
Merge pull request #3750 from Trass3r/master

use enums
Merge pull request #3749 from yebblies/valistfix

[DDMD] Remove extern "C" verror hacks now that va_list has been fixed
Merge pull request #3770 from yebblies/gluector

[DDMD] Do not call constructors from the glue layer (lib*)
Merge pull request #3772 from yebblies/linesplice

[DDMD] Remove unnecessary line splicing in clone.c
Merge pull request #3771 from yebblies/signext

[DDMD] Make construction of SignExtendedNumber explicit