etcd: build with vendored libraries

Also xlintify.

srcpkgs/etcd/template

@@ -1,15 +1,13 @@
 # Template file for 'etcd'
 pkgname=etcd
 version=3.4.4
-revision=1
+revision=2
 build_style=go
+go_import_path="github.com/coreos/etcd"
+go_package="${go_import_path} ${go_import_path}/etcdctl"
 short_desc="Distributed reliable key-value store"
 maintainer="Andrea Brancaleoni <abc@pompel.me>"
 license="Apache-2.0"
-hostmakedepends="git glide"
-go_import_path="github.com/coreos/etcd"
-go_package="${go_import_path} ${go_import_path}/etcdctl"
-go_mod_mode="default"
 homepage="https://coreos.com/etcd/docs/latest/"
 distfiles="https://${go_import_path}/archive/v${version}.tar.gz"
 checksum=46bcd0d034fe9cc6ae86a9f2a72bdc78761ca99bfd5ae4b96b24e4ad93fc627e
@@ -17,7 +15,10 @@ conf_files="/etc/sv/etcd/conf"
 system_accounts="etcd"
 make_dirs="/var/lib/etcd 0755 etcd etcd"
 
+post_extract() {
+	ln -s $wrksrc vendor/$go_import_path
+}
+
 post_install() {
-	vlicense LICENSE
 	vsv etcd
 }