wrap POSIX dynamic linking API and stdio.h extensions

Fix typo and add missing comma.

Conflicts:
	Cython/Compiler/Optimize.py
	Cython/Compiler/StringEncoding.py

fix bytes literal creation from compile-time DEF expressions (used to become Unicode strings due to missing encoding)

This avoids the issue with overloaded address-of operators.

CHANGES: fix Docutils warnings: Inline emphasis start-string without end-string.

Fix typo.

This avoids the issue with overloaded address-of operators.

Conflicts:
	CHANGES.rst

seems like the explicit deepcopy helpers in the control flow state objects are no longer needed but crash the compiler due to infinite recursion

base buffer handling conditions during code generation only on used buffer entries to avoid overhead if all of them are unused