[dmd-internals] Recommended patch list

[Don Clugston]

There are some great patches in Bugzilla at the moment. A couple of
infamous forward reference bugs
that have been hurting Phobos development. Also, all known compiler
segfaults have patches in this list.
The first block of patches is the most important.

3935 opBinary is instantiated with "="
190 Cannot forward reference typedef/alias in default value for
function parameter
  also fixes
  3979 Order-of-compilation and forward reference errors
4652 Compiler hangs on template with zero-length tuple and another argument
   also fixes
   4676 Overload resolution rejects valid code when mixing variadics,
non-variadics
4564 ICE on undefined variable in foreach over 0 .. undef
3493 Segfault(cast.c) Forward reference with type inference, D1 only.

2511 Covariant return type doesn't work with circular import
2716 Confusion of auto and scope as the class attribute
4278 allow inlining of super calls (undo limitations of bug3500's fix)
2477 Trailing comma in array literal sometimes accepted, sometimes not

4291 Pure functions cannot access mixed in variables
4177 __ctfe can't be used in pure functions

<Haven't tested this one as it's Linux only, but looks impressive>
4620 C++ constructor and template mangling, C++ ABI patch
 it should also fix this next one, though I have included a patch for
3046 anyway
 3046 Segfault with C++ static variable (Linux only)