#11732: add a new suppress_crash_popup() context manager to test.support that disables crash popups on Windows and use it in test_ctypes.

Mostly moving the existing macro docs over from the standard
library docs to the C API docs where they belong.

Patch by Kushal Das.

Refactor ftplib by getting rid of 4 methods (retr*() and stor*()) which were duplicated in TLS_FTP class.

empty string and latin1 single character

empty string and latin1 single character

This method is dead code - not documented, not tested. As far as we know, it
can be horribly broken.

to reject invalid UTF-16 surrogate.

code points bigger than U+10ffff

response message when  send_error includes a message in addition to error
status. Patch contributed by Karl.

response message when  send_error includes a message in addition to error
status. Patch contributed by Karl.

response message when  send_error includes a message in addition to error
status. Patch contributed by Karl.

This removes the dependency on bisect and it bring the pure Python code
in-sync with the C code.