Godeps, vendor: convert dependency management to trash (#3198)

This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.

1 files changed, 57 insertions, 0 deletions

diff --git a/vendor/github.com/peterh/liner/fallbackinput.go b/vendor/github.com/peterh/liner/fallbackinput.go
new file mode 100644
index 000000000..d9eb79d9e
--- /dev/null
+++ b/vendor/github.com/peterh/liner/fallbackinput.go
@@ -0,0 +1,57 @@
+// +build !windows,!linux,!darwin,!openbsd,!freebsd,!netbsd
+
+package liner
+
+import (
+	"bufio"
+	"errors"
+	"os"
+)
+
+// State represents an open terminal
+type State struct {
+	commonState
+}
+
+// Prompt displays p, and then waits for user input. Prompt does not support
+// line editing on this operating system.
+func (s *State) Prompt(p string) (string, error) {
+	return s.promptUnsupported(p)
+}
+
+// PasswordPrompt is not supported in this OS.
+func (s *State) PasswordPrompt(p string) (string, error) {
+	return "", errors.New("liner: function not supported in this terminal")
+}
+
+// NewLiner initializes a new *State
+//
+// Note that this operating system uses a fallback mode without line
+// editing. Patches welcome.
+func NewLiner() *State {
+	var s State
+	s.r = bufio.NewReader(os.Stdin)
+	return &s
+}
+
+// Close returns the terminal to its previous mode
+func (s *State) Close() error {
+	return nil
+}
+
+// TerminalSupported returns false because line editing is not
+// supported on this platform.
+func TerminalSupported() bool {
+	return false
+}
+
+type noopMode struct{}
+
+func (n noopMode) ApplyMode() error {
+	return nil
+}
+
+// TerminalMode returns a noop InputModeSetter on this platform.
+func TerminalMode() (ModeApplier, error) {
+	return noopMode{}, nil
+}