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, 0 insertions, 184 deletions

diff --git a/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/iterator/array_iter.go b/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/iterator/array_iter.go
deleted file mode 100644
index a23ab05f7..000000000
--- a/Godeps/_workspace/src/github.com/syndtr/goleveldb/leveldb/iterator/array_iter.go
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
-// All rights reserved.
-//
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package iterator
-
-import (
-	"github.com/syndtr/goleveldb/leveldb/util"
-)
-
-// BasicArray is the interface that wraps basic Len and Search method.
-type BasicArray interface {
-	// Len returns length of the array.
-	Len() int
-
-	// Search finds smallest index that point to a key that is greater
-	// than or equal to the given key.
-	Search(key []byte) int
-}
-
-// Array is the interface that wraps BasicArray and basic Index method.
-type Array interface {
-	BasicArray
-
-	// Index returns key/value pair with index of i.
-	Index(i int) (key, value []byte)
-}
-
-// Array is the interface that wraps BasicArray and basic Get method.
-type ArrayIndexer interface {
-	BasicArray
-
-	// Get returns a new data iterator with index of i.
-	Get(i int) Iterator
-}
-
-type basicArrayIterator struct {
-	util.BasicReleaser
-	array BasicArray
-	pos   int
-	err   error
-}
-
-func (i *basicArrayIterator) Valid() bool {
-	return i.pos >= 0 && i.pos < i.array.Len() && !i.Released()
-}
-
-func (i *basicArrayIterator) First() bool {
-	if i.Released() {
-		i.err = ErrIterReleased
-		return false
-	}
-
-	if i.array.Len() == 0 {
-		i.pos = -1
-		return false
-	}
-	i.pos = 0
-	return true
-}
-
-func (i *basicArrayIterator) Last() bool {
-	if i.Released() {
-		i.err = ErrIterReleased
-		return false
-	}
-
-	n := i.array.Len()
-	if n == 0 {
-		i.pos = 0
-		return false
-	}
-	i.pos = n - 1
-	return true
-}
-
-func (i *basicArrayIterator) Seek(key []byte) bool {
-	if i.Released() {
-		i.err = ErrIterReleased
-		return false
-	}
-
-	n := i.array.Len()
-	if n == 0 {
-		i.pos = 0
-		return false
-	}
-	i.pos = i.array.Search(key)
-	if i.pos >= n {
-		return false
-	}
-	return true
-}
-
-func (i *basicArrayIterator) Next() bool {
-	if i.Released() {
-		i.err = ErrIterReleased
-		return false
-	}
-
-	i.pos++
-	if n := i.array.Len(); i.pos >= n {
-		i.pos = n
-		return false
-	}
-	return true
-}
-
-func (i *basicArrayIterator) Prev() bool {
-	if i.Released() {
-		i.err = ErrIterReleased
-		return false
-	}
-
-	i.pos--
-	if i.pos < 0 {
-		i.pos = -1
-		return false
-	}
-	return true
-}
-
-func (i *basicArrayIterator) Error() error { return i.err }
-
-type arrayIterator struct {
-	basicArrayIterator
-	array      Array
-	pos        int
-	key, value []byte
-}
-
-func (i *arrayIterator) updateKV() {
-	if i.pos == i.basicArrayIterator.pos {
-		return
-	}
-	i.pos = i.basicArrayIterator.pos
-	if i.Valid() {
-		i.key, i.value = i.array.Index(i.pos)
-	} else {
-		i.key = nil
-		i.value = nil
-	}
-}
-
-func (i *arrayIterator) Key() []byte {
-	i.updateKV()
-	return i.key
-}
-
-func (i *arrayIterator) Value() []byte {
-	i.updateKV()
-	return i.value
-}
-
-type arrayIteratorIndexer struct {
-	basicArrayIterator
-	array ArrayIndexer
-}
-
-func (i *arrayIteratorIndexer) Get() Iterator {
-	if i.Valid() {
-		return i.array.Get(i.basicArrayIterator.pos)
-	}
-	return nil
-}
-
-// NewArrayIterator returns an iterator from the given array.
-func NewArrayIterator(array Array) Iterator {
-	return &arrayIterator{
-		basicArrayIterator: basicArrayIterator{array: array, pos: -1},
-		array:              array,
-		pos:                -1,
-	}
-}
-
-// NewArrayIndexer returns an index iterator from the given array.
-func NewArrayIndexer(array ArrayIndexer) IteratorIndexer {
-	return &arrayIteratorIndexer{
-		basicArrayIterator: basicArrayIterator{array: array, pos: -1},
-		array:              array,
-	}
-}