* tty.cc (tty_list::allocate): Set sid to 0 rather than -1 since -1 is an error
condition.
* fhandler_termios.cc (tty_min::kill_pgrp): Don't send a signal to myself if
this process is exiting.
.
* fhandler.h (fhandler_base::cleanup): Mark as extern rather than inline.
* fhandler_base.cc (fhandler_base::cleanup): Define.
* fhandler_tty.cc (fhandler_pty_slave::cleanup): Call fhandler_base::cleanup.
(fhandler_pty_master::cleanup): Ditto.
	* fhandler.cc (fhandler_base::fstat): Drop FH_FULL case to align
	/dev/full permissions to Linux.
	* libc/include/stdio.h (funopen): Change prototype of
	__readfn and __writefn parameter to match new definition of
	FILE's _read and _write methods.
	(_funopen_r): Ditto.
	(funopen): Ditto.
	(_funopen_r): Ditto.
	* libc/include/sys/config.h (_READ_WRITE_BUFSIZE_TYPE) Define
	as type int if not already defined.  Add comment to explain.
	* libc/include/sys/reent.h: Include stddef.h.
	(struct __sFILE): Change type of last parameter in declaration
	of _read and _write methods to _READ_WRITE_BUFSIZE_TYPE.
	(struct __sFILE64): Ditto.
	* libc/stdio/local.h (__sread): Declare with last parameter set
	to _READ_WRITE_BUFSIZE_TYPE.
	(__seofread): Ditto.
	(__swrite): Ditto.
	(__swrite64): Ditto.
	* libc/stdio/fvwrite.c (__sfvwrite_r): Change type of local
	variables w and s to _READ_WRITE_RETURN_TYPE.
	* libc/stdio/fflush.c (__sflush_r): Change type of local variables
	n and t to _READ_WRITE_BUFSIZE_TYPE and _READ_WRITE_RETURN_TYPE.
	Add local variables flags to keep _flags value.
	* libc/stdio/fmemopen.c (fmemreader): Align to above change.
	(fmemwriter): Ditto.
	* libc/stdio/fopencookie.c (fcreader): Ditto.
	(fcwriter): Ditto.
	* libc/stdio/funopen.c (funread): Ditto.
	(funwrite): Ditto.
	(funreader): Ditto.
	(funwriter): Ditto.
	* libc/stdio/open_memstream.c (memwriter): Ditto.
	* libc/stdio/stdio.c (__sread): Ditto.
	(__seofread): Ditto.
	(__swrite): Ditto.
	* libc/stdio64/stdio64.c (__swrite64): Ditto.
	* include /cygwin/config.h (_READ_WRITE_BUFSIZE_TYPE): Define.
merge from gcc
	* libc/include/stdio.h [!__LARGE64_FILES] (funopen): Fix typo
	in last change.
	* devices.in (dev_storage): Map /dev/zero and /dev/full to \Device\Null.
	* devices.cc: Regenerate.
	* dtable.h (struct dtable): Make fhandler_base friend, rather
	than fhandler_disk_file.
	* fhandler.cc (fhandler_base::open_with_arch): Create unique id.
	(fhandler_base::cleanup): Call del_my_locks.
	(fhandler_base::fcntl): Handle F_GETLK, F_SETLK and F_SETLKW.
	* fhandler.h (fhandler_base::get_dev): Return real device number.
	(fhandler_base::set_unique_id): New inline method.
	(fhandler_disk_file::lock): Drop declaration.
	(fhandler_disk_file::get_dev): New method, return pc.fs_serial_number.
	(fhandler_dev_zero::open): Drop declaration.
	* fhandler_disk_file.cc (fhandler_disk_file::close): Move
	del_my_locks call to fhandler_base::open_with_arch.
	(fhandler_disk_file::fcntl): Move handling of locking commands to
	fhandler_base::fcntl.
	(fhandler_base::open_fs): Drop call to NtAllocateLocallyUniqueId.
	* fhandler_zero.cc (fhandler_dev_zero::open): Remove so that default
	fhandler_base::open is used to open \Device\Null.
	* flock.cc (fixup_lockf_after_exec): Finding a single fhandler is
	enough here.
	(fhandler_base::lock): Replace fhandler_disk_file::lock.  Refuse to lock
	nohandle devices.  Handle read/write test using POSIX flags.  Explain
	why.  Never fail on SEEK_CUR or SEEK_END, rather assume position 0,
	just as Linux.
	* net.cc (fdsock): Create unique id.
Merge branch 'Cygwin' into develop

Conflicts:
	winsup/cygwin/devices.cc