MFC 358394: Use stream_read() to read all 12 bytes of the RFB client version.

read() can return a short read, whereas stream_read() waits until the
full version string is read.

MFC r349196:
Make zlib encoding messages idempotent.

PR: 238333

MFC 333235:
Allow arbitrary numbers of columns for VNC server screen resolution.

The prior code only allowed multiples of 32 for the
numbers of columns. Remove this restriction to allow
a forthcoming UEFI firmware update to allow arbitrary
x,y resolutions.

(the code for handling rows already supported non mult-32 values)

MFC r339586:

In bhyve's fbuf emulation improve the overall "usage" message and
for the vga option, rather than printing the entire option string,
only print vga (as we do for everything else).

MFC r339681:

Allow the bhyve VNC server to listen on IPv6 for incoming connections.

Alternatively to IPv4 address:port this will allow to listen on IPv6
link-local (incl. scope), a specific address, or ::. Addresses have
to be given in RFC2732 format so that [::]:port parsing will work.

This patch also starts to introduce WITH_INET/INET6_SUPPORT to bhyve.

PR: 232018
Submitted by: Dave Rush (northwoodlogic.free gmail.com) (original)
Reviewed by: Dave Rush (updated verison)

MFC r335025:

Add SPDX tags to bhyve(8).

Discussed with: rgrimes, pfg and mav.
Obtained from: TrueOS
Sponsored by: iXsystems Inc.

MFC r334307, r335103-r335104

r334307:
Simplify macros EFPRINTF and EFFLUSH. [0]
Also stdarg(3) says that each invocation of va_start() must be paired
with a corresponding invocation of va_end() in the same function. [1]

Reported by: Coverity
CID: 1194318[0] and 1194332[1]
Discussed with: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15548

r335103:
Fix style(9) space vs tab.

Reviewed by: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15774

r335104:
Fix style(9) space vs tab.

Reviewed by: jhb
Sponsored by: iXsystems Inc.
Differential Revision: https://reviews.freebsd.org/D15768

MFC r317542, r317543, r317543

317542 comment fix
317543 set rfb default port
317543 listen on localhost by default for rfb

MFC 313727, 317483
In addition, replace the missing caph routines with
small helper functions (bhyverun.c) or an open-coded
replacement (uart_emul.c)

313727 Capsicumize bhyve
317483 Allow CAP_MMAP_RW on memfd for PCI passthru

MFC r319487-r319488, r319682, r319968, r319995

r319487:
Add VNC Authentication support based on RFC6143 section 7.2.2.

Submitted by: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Reworked by: myself
Reviewed by: grehan, rgrimes and jilles
Relnotes: Yes.
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D10818

r319488:
Bump manpage date.

r319682:
Make the VNC authentication build with LibreSSL on HardenedBSD and TrueOS.

PR: 219790
Submitted by: Shirkdog <mshirk@daemon-security.com>
Reviewed by: grehan and rgrimes
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D11071

r319968:
Initialize variables and use byteorder(9) instead of aliasing char array
buf via uint32_t pointer.

CID: 1375949
Reported by: Coverity, cem
Reviewed by: cem
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D11153

r319995:
Check if pthread_create(3) successfully created the thread prior to call
pthread_join(3). The variable tid is not yet initialized in case
the authentication fails at early stage, that would lead pthread_join be
called with an uninitialized variable.

CID: 1375950
Reported by: Coverity, cem
Reviewed by: cem
Sponsored by: iXsystems, Inc.
Differential Revision: https://reviews.freebsd.org/D11150

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation