*: test, docs with go1.6+

etcd v3 uses http/2, which doesn't work well with go1.5

.travis.yml

@@ -4,7 +4,6 @@ go_import_path: github.com/coreos/etcd
 sudo: false
 
 go:
-  - 1.5
   - 1.6
   - tip
 
@@ -22,10 +21,6 @@ matrix:
   allow_failures:
     - go: tip
   exclude:
-  - go: 1.5
-    env: TARGET=arm
-  - go: 1.5
-    env: TARGET=ppc64le
   - go: 1.6
     env: TARGET=arm64
   - go: tip

Documentation/dl_build.md

@@ -11,7 +11,7 @@ The easiest way to get etcd is to use one of the pre-built release binaries whic
 ## Build the latest version
 
 For those wanting to try the very latest version, build etcd from the `master` branch.
-[Go](https://golang.org/) version 1.5+ is required to build the latest version of etcd.
+[Go](https://golang.org/) version 1.6+ (with HTTP2 support) is required to build the latest version of etcd.
 
 Here are the commands to build an etcd binary from the `master` branch:
 

README.md

@@ -40,7 +40,7 @@ See [etcdctl][etcdctl] for a simple command line client.
 The easiest way to get etcd is to use one of the pre-built release binaries which are available for OSX, Linux, Windows, AppC (ACI), and Docker. Instructions for using these binaries are on the [GitHub releases page][github-release].
 
 For those wanting to try the very latest version, you can build the latest version of etcd from the `master` branch.
-You will first need [*Go*](https://golang.org/) installed on your machine (version 1.5+ is required).
+You will first need [*Go*](https://golang.org/) installed on your machine (version 1.6+ is required).
 All development occurs on `master`, including new features and bug fixes.
 Bug fixes are first targeted at `master` and subsequently ported to release branches, as described in the [branch management][branch-management] guide.