Delete vendored code and update CI to Go 1.13 (#158)

As the Go community transitions to using the modules ecosystem,
we want to only support one way of managing dependencies.
So this change moves to only using Go modules for dependency management.

This means that our effective minimum Go version increases to Go 1.11.
To account for this, we also update:
  - the documentation
  - Makefile
  - CI scripts

1 files changed, 0 insertions, 264 deletions

diff --git a/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl b/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl
deleted file mode 100644
index 49f186f..0000000
--- a/vendor/golang.org/x/sys/unix/mksysctl_openbsd.pl
+++ /dev/null
@@ -1,264 +0,0 @@
-#!/usr/bin/env perl
-
-# Copyright 2011 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-#
-# Parse the header files for OpenBSD and generate a Go usable sysctl MIB.
-#
-# Build a MIB with each entry being an array containing the level, type and
-# a hash that will contain additional entries if the current entry is a node.
-# We then walk this MIB and create a flattened sysctl name to OID hash.
-#
-
-use strict;
-
-if($ENV{'GOARCH'} eq "" || $ENV{'GOOS'} eq "") {
-	print STDERR "GOARCH or GOOS not defined in environment\n";
-	exit 1;
-}
-
-my $debug = 0;
-my %ctls = ();
-
-my @headers = qw (
-	sys/sysctl.h
-	sys/socket.h
-	sys/tty.h
-	sys/malloc.h
-	sys/mount.h
-	sys/namei.h
-	sys/sem.h
-	sys/shm.h
-	sys/vmmeter.h
-	uvm/uvm_param.h
-	uvm/uvm_swap_encrypt.h
-	ddb/db_var.h
-	net/if.h
-	net/if_pfsync.h
-	net/pipex.h
-	netinet/in.h
-	netinet/icmp_var.h
-	netinet/igmp_var.h
-	netinet/ip_ah.h
-	netinet/ip_carp.h
-	netinet/ip_divert.h
-	netinet/ip_esp.h
-	netinet/ip_ether.h
-	netinet/ip_gre.h
-	netinet/ip_ipcomp.h
-	netinet/ip_ipip.h
-	netinet/pim_var.h
-	netinet/tcp_var.h
-	netinet/udp_var.h
-	netinet6/in6.h
-	netinet6/ip6_divert.h
-	netinet6/pim6_var.h
-	netinet/icmp6.h
-	netmpls/mpls.h
-);
-
-my @ctls = qw (
-	kern
-	vm
-	fs
-	net
-	#debug				# Special handling required
-	hw
-	#machdep			# Arch specific
-	user
-	ddb
-	#vfs				# Special handling required
-	fs.posix
-	kern.forkstat
-	kern.intrcnt
-	kern.malloc
-	kern.nchstats
-	kern.seminfo
-	kern.shminfo
-	kern.timecounter
-	kern.tty
-	kern.watchdog
-	net.bpf
-	net.ifq
-	net.inet
-	net.inet.ah
-	net.inet.carp
-	net.inet.divert
-	net.inet.esp
-	net.inet.etherip
-	net.inet.gre
-	net.inet.icmp
-	net.inet.igmp
-	net.inet.ip
-	net.inet.ip.ifq
-	net.inet.ipcomp
-	net.inet.ipip
-	net.inet.mobileip
-	net.inet.pfsync
-	net.inet.pim
-	net.inet.tcp
-	net.inet.udp
-	net.inet6
-	net.inet6.divert
-	net.inet6.ip6
-	net.inet6.icmp6
-	net.inet6.pim6
-	net.inet6.tcp6
-	net.inet6.udp6
-	net.mpls
-	net.mpls.ifq
-	net.key
-	net.pflow
-	net.pfsync
-	net.pipex
-	net.rt
-	vm.swapencrypt
-	#vfsgenctl			# Special handling required
-);
-
-# Node name "fixups"
-my %ctl_map = (
-	"ipproto" => "net.inet",
-	"net.inet.ipproto" => "net.inet",
-	"net.inet6.ipv6proto" => "net.inet6",
-	"net.inet6.ipv6" => "net.inet6.ip6",
-	"net.inet.icmpv6" => "net.inet6.icmp6",
-	"net.inet6.divert6" => "net.inet6.divert",
-	"net.inet6.tcp6" => "net.inet.tcp",
-	"net.inet6.udp6" => "net.inet.udp",
-	"mpls" => "net.mpls",
-	"swpenc" => "vm.swapencrypt"
-);
-
-# Node mappings
-my %node_map = (
-	"net.inet.ip.ifq" => "net.ifq",
-	"net.inet.pfsync" => "net.pfsync",
-	"net.mpls.ifq" => "net.ifq"
-);
-
-my $ctlname;
-my %mib = ();
-my %sysctl = ();
-my $node;
-
-sub debug() {
-	print STDERR "$_[0]\n" if $debug;
-}
-
-# Walk the MIB and build a sysctl name to OID mapping.
-sub build_sysctl() {
-	my ($node, $name, $oid) = @_;
-	my %node = %{$node};
-	my @oid = @{$oid};
-
-	foreach my $key (sort keys %node) {
-		my @node = @{$node{$key}};
-		my $nodename = $name.($name ne '' ? '.' : '').$key;
-		my @nodeoid = (@oid, $node[0]);
-		if ($node[1] eq 'CTLTYPE_NODE') {
-			if (exists $node_map{$nodename}) {
-				$node = \%mib;
-				$ctlname = $node_map{$nodename};
-				foreach my $part (split /\./, $ctlname) {
-					$node = \%{@{$$node{$part}}[2]};
-				}
-			} else {
-				$node = $node[2];
-			}
-			&build_sysctl($node, $nodename, \@nodeoid);
-		} elsif ($node[1] ne '') {
-			$sysctl{$nodename} = \@nodeoid;
-		}
-	}
-}
-
-foreach my $ctl (@ctls) {
-	$ctls{$ctl} = $ctl;
-}
-
-# Build MIB
-foreach my $header (@headers) {
-	&debug("Processing $header...");
-	open HEADER, "/usr/include/$header" ||
-	    print STDERR "Failed to open $header\n";
-	while (<HEADER>) {
-		if ($_ =~ /^#define\s+(CTL_NAMES)\s+{/ ||
-		    $_ =~ /^#define\s+(CTL_(.*)_NAMES)\s+{/ ||
-		    $_ =~ /^#define\s+((.*)CTL_NAMES)\s+{/) {
-			if ($1 eq 'CTL_NAMES') {
-				# Top level.
-				$node = \%mib;
-			} else {
-				# Node.
-				my $nodename = lc($2);
-				if ($header =~ /^netinet\//) {
-					$ctlname = "net.inet.$nodename";
-				} elsif ($header =~ /^netinet6\//) {
-					$ctlname = "net.inet6.$nodename";
-				} elsif ($header =~ /^net\//) {
-					$ctlname = "net.$nodename";
-				} else {
-					$ctlname = "$nodename";
-					$ctlname =~ s/^(fs|net|kern)_/$1\./;
-				}
-				if (exists $ctl_map{$ctlname}) {
-					$ctlname = $ctl_map{$ctlname};
-				}
-				if (not exists $ctls{$ctlname}) {
-					&debug("Ignoring $ctlname...");
-					next;
-				}
-
-				# Walk down from the top of the MIB.
-				$node = \%mib;
-				foreach my $part (split /\./, $ctlname) {
-					if (not exists $$node{$part}) {
-						&debug("Missing node $part");
-						$$node{$part} = [ 0, '', {} ];
-					}
-					$node = \%{@{$$node{$part}}[2]};
-				}
-			}
-
-			# Populate current node with entries.
-			my $i = -1;
-			while (defined($_) && $_ !~ /^}/) {
-				$_ = <HEADER>;
-				$i++ if $_ =~ /{.*}/;
-				next if $_ !~ /{\s+"(\w+)",\s+(CTLTYPE_[A-Z]+)\s+}/;
-				$$node{$1} = [ $i, $2, {} ];
-			}
-		}
-	}
-	close HEADER;
-}
-
-&build_sysctl(\%mib, "", []);
-
-print <<EOF;
-// mksysctl_openbsd.pl
-// Code generated by the command above; DO NOT EDIT.
-
-// +build $ENV{'GOARCH'},$ENV{'GOOS'}
-
-package unix;
-
-type mibentry struct {
-	ctlname string
-	ctloid []_C_int
-}
-
-var sysctlMib = []mibentry {
-EOF
-
-foreach my $name (sort keys %sysctl) {
-	my @oid = @{$sysctl{$name}};
-	print "\t{ \"$name\", []_C_int{ ", join(', ', @oid), " } }, \n";
-}
-
-print <<EOF;
-}
-EOF