Update to go-1.16.5

Hi,

> go1.16.5 (released 2021-06-03) includes security fixes to the
> archive/zip, math/big, net, and net/http/httputil packages, as well
> as bug fixes to the linker, the go command, and the net/http
> packagckage.

https://golang.org/doc/devel/release#go1.16.minor

More details can be found on the announce:
https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI/m/r_EP-NlKBgAJ

> The SetString and UnmarshalText methods of math/big.Rat may cause a
> panic or an unrecoverable fatal error if passed inputs with very large
> exponents. This is issue #45910 and CVE-2021-33198.
>
> ReverseProxy in net/http/httputil could be made to forward certain
> hop-by-hop headers, including Connection. In case the target of the
> ReverseProxy was itself a reverse proxy, this would let an attacker
> drop arbitrary headers, including those set by the
> ReverseProxy.Director. This is issue #46313 and CVE-2021-33197.
>
> The LookupCNAME, LookupSRV, LookupMX, LookupNS, and LookupAddr
> functions in net, and their respective methods on the Resolver type
> may return arbitrary values retrieved from DNS which do not follow the
> established RFC 1035 rules for domain names. If these names are used
> without further sanitization, for instance unsafely included in HTML,
> they may allow for injection of unexpected content. Note that
> LookupTXT may still return arbitrary values that could require
> sanitization before further use. This is issue #46241 and
> CVE-2021-33195.
>
> The NewReader and OpenReader functions in archive/zip can cause a
> panic or an unrecoverable fatal error when reading an archive that
> claims to contain a large number of files, regardless of its actual
> size. This is issue #46242 and CVE-2021-33196.


Patches didn't need to be regenerated and all tests pass on my amd64
machine.

Comments? OK?

Index: Makefile
===================================================================
RCS file: /cvs/ports/lang/go/Makefile,v
retrieving revision 1.100
diff -u -p -r1.100 Makefile
--- Makefile 16 May 2021 07:40:45 -0000 1.100
+++ Makefile 5 Jun 2021 12:52:23 -0000
@@ -7,7 +7,7 @@ BIN_BOOTSTRAP_VERSION = 1.16

COMMENT = Go programming language

-VERSION = 1.16.4
+VERSION = 1.16.5
DISTNAME = go${VERSION}.src
PKGNAME = go-${VERSION}
PKGSPEC = ${FULLPKGNAME:S/go-/go-=/}
Index: distinfo
===================================================================
RCS file: /cvs/ports/lang/go/distinfo,v
retrieving revision 1.62
diff -u -p -r1.62 distinfo
--- distinfo 16 May 2021 07:40:45 -0000 1.62
+++ distinfo 5 Jun 2021 12:52:23 -0000
@@ -2,9 +2,9 @@ SHA256 (go-openbsd-386-bootstrap-1.16.ta
SHA256 (go-openbsd-arm-bootstrap-1.16.tar.gz) = DjjCEzU/FnndIrKC8gh5PKAZkKp9Lt49aT3XPqhEWNM=
SHA256 (go-openbsd-arm64-bootstrap-1.16.tar.gz) = qqc/TtaBfoq5oJcOHoqNZ6+bO+OOIRZoW1zlj19uBVw=
SHA256 (go-openbsd-mips64-bootstrap-1.16.tar.gz) = dwojdjHgxrLlKC8QbseRYnOf8s/wN/Wx+UkPhH2aeJY=
-SHA256 (go1.16.4.src.tar.gz) = rk9rbioWd9MYF5hGVadiB0tTVtpQ+1hyK5kQSHDUNQM=
+SHA256 (go1.16.5.src.tar.gz) = e/p+WQjHzJ512l3fMGbXy88/2fpRlFhRMl7rwX9QuoA=
SIZE (go-openbsd-386-bootstrap-1.16.tar.gz) = 131493298
SIZE (go-openbsd-arm-bootstrap-1.16.tar.gz) = 128073881
SIZE (go-openbsd-arm64-bootstrap-1.16.tar.gz) = 126892240
SIZE (go-openbsd-mips64-bootstrap-1.16.tar.gz) = 129935270
-SIZE (go1.16.4.src.tar.gz) = 20917203
+SIZE (go1.16.5.src.tar.gz) = 20921372