JA to JC, JBE to JNC
fix Issue 9990 - templates with function alias cause forward reference error
fix Issue 9993 - const ctor should be preferred than mutable for const obj creation
fix Issue 9931 - Mac OS X ABI not followed when returning structs for extern (C)
fix Issue 9994 - Built-in generated opAssign should call dtor on assignment
Additional fix for issue 9679 - see 'redundant storage class'
Check redundant/conflicting storage class in foreach statement
Fix the error messages format
Merge pull request #1938 from WalterBright/fix9931

fix Issue 9931 - Mac OS X ABI not followed when returning structs for extern (C)
Merge pull request #1941 from 9rnsr/fix9994

Issue 9994 - Built-in generated opAssign should call dtor on assignment
Merge pull request #1936 from 9rnsr/fix9990

Issue 9990 - templates with function alias cause forward reference error
Merge pull request #1939 from 9rnsr/fix9993

Issue 9993 - const ctor should be preferred than mutable for const obj creation
Merge pull request #1940 from 9rnsr/fix_parser

Fix parser for proper "redundant storage class" check
Merge pull request #1928 from WalterBright/toJC

JA to JC, JBE to JNC
fix Issue 9985 - Postblit isn't called on local struct return

Until 'ref' deduction finished, auto ref function is not an actual ref function. So compiler should keep NRVO ability.
Merge pull request #1933 from 9rnsr/fix9985

Issue 9985 - Postblit isn't called on local struct return