fix Issue 10716 - Horrifically slow compilation for array literals inside functions
Switch to power of 2 tables in aav.c

Brings in somewhere in area of 1-2% increase in speed as measured by
dmd -unittest -c std\algorithm.d

on Linux x64

This closely follows the original prime sizes by using next pow-2 of primes
and reproducing roughly the same grow factor (=4).

Takes into account that key are aligned pointers to strings
and thus need a fair bit-shake to get a decent distribution.
remove ifdef'ed trace from aav.c
fix Issue 10431 - ICE(DMD 2.063) in struct.c:741 (1)
Fix issue 10388 - Compile DMD with Clang on Mac OS X.
fix Issue 10761 - DMD crashes on unspecified inout matching
fix Issue 10758 - Unsound type checking for inout
fix issue 10783 - ICE and bad diagnostics when using non-existent
symbols in switch and with statements
Merge pull request #2457 from hpohl/10783

fix issue 10783 - ICE and bad diagnostics when using non-existent symbols in switch and with statements
fix issue 9247 - Compiler accepts opaque struct returned by value from
function pointer declaration.
Add Port::fequal for longdouble comparisons.
fix Issue 10726 - Bogus Circular Reference error if opEquals defined and has a loop

This is also the better fix for issue 10567.
Update 10567 test case for exhaustive check of TypeInfo generation
Merge pull request #2458 from hpohl/9247

fix issue 9247 - Compiler accepts opaque struct returned by value from function pointer declaration.
fix issue 10788 - forward reference of enum member E from another module
fix issue 10787 - static ~this attributes position
Merge pull request #2461 from ibuclaw/fequal

Add Port::fequal for longdouble comparisons.
fix Issue 4481 - ICE(glue.c,!vthis->csym) or compiles, depending on the import statements order
fix issue 10792 - Bad diagnostic on new eponymous enum template syntax
Merge pull request #2465 from hpohl/10792

fix issue 10792 - Bad diagnostic on new eponymous enum template syntax