Re-think integration vendoring

- remove docker/docker from  Traefik vendor (unused)
- use `ignore` for all Traefik vendor in integration glide.
- defined only integration specific version of the dependencies.

integration/vendor/github.com/spf13/pflag/ipmask.go

@@ -3,6 +3,7 @@ package pflag
 import (
 	"fmt"
 	"net"
+	"strconv"
 )
 
 // -- net.IPMask value
@@ -27,23 +28,58 @@ func (i *ipMaskValue) Type() string {
 	return "ipMask"
 }
 
-// Parse IPv4 netmask written in IP form (e.g. 255.255.255.0).
+// ParseIPv4Mask written in IP form (e.g. 255.255.255.0).
 // This function should really belong to the net package.
 func ParseIPv4Mask(s string) net.IPMask {
 	mask := net.ParseIP(s)
 	if mask == nil {
-		return nil
+		if len(s) != 8 {
+			return nil
+		}
+		// net.IPMask.String() actually outputs things like ffffff00
+		// so write a horrible parser for that as well  :-(
+		m := []int{}
+		for i := 0; i < 4; i++ {
+			b := "0x" + s[2*i:2*i+2]
+			d, err := strconv.ParseInt(b, 0, 0)
+			if err != nil {
+				return nil
+			}
+			m = append(m, int(d))
+		}
+		s := fmt.Sprintf("%d.%d.%d.%d", m[0], m[1], m[2], m[3])
+		mask = net.ParseIP(s)
+		if mask == nil {
+			return nil
+		}
 	}
 	return net.IPv4Mask(mask[12], mask[13], mask[14], mask[15])
 }
 
+func parseIPv4Mask(sval string) (interface{}, error) {
+	mask := ParseIPv4Mask(sval)
+	if mask == nil {
+		return nil, fmt.Errorf("unable to parse %s as net.IPMask", sval)
+	}
+	return mask, nil
+}
+
+// GetIPv4Mask return the net.IPv4Mask value of a flag with the given name
+func (f *FlagSet) GetIPv4Mask(name string) (net.IPMask, error) {
+	val, err := f.getFlagType(name, "ipMask", parseIPv4Mask)
+	if err != nil {
+		return nil, err
+	}
+	return val.(net.IPMask), nil
+}
+
 // IPMaskVar defines an net.IPMask flag with specified name, default value, and usage string.
 // The argument p points to an net.IPMask variable in which to store the value of the flag.
 func (f *FlagSet) IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
 	f.VarP(newIPMaskValue(value, p), name, "", usage)
 }
 
-// Like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
 func (f *FlagSet) IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
 	f.VarP(newIPMaskValue(value, p), name, shorthand, usage)
 }
@@ -54,7 +90,7 @@ func IPMaskVar(p *net.IPMask, name string, value net.IPMask, usage string) {
 	CommandLine.VarP(newIPMaskValue(value, p), name, "", usage)
 }
 
-// Like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
+// IPMaskVarP is like IPMaskVar, but accepts a shorthand letter that can be used after a single dash.
 func IPMaskVarP(p *net.IPMask, name, shorthand string, value net.IPMask, usage string) {
 	CommandLine.VarP(newIPMaskValue(value, p), name, shorthand, usage)
 }
@@ -67,7 +103,7 @@ func (f *FlagSet) IPMask(name string, value net.IPMask, usage string) *net.IPMas
 	return p
 }
 
-// Like IPMask, but accepts a shorthand letter that can be used after a single dash.
+// IPMaskP is like IPMask, but accepts a shorthand letter that can be used after a single dash.
 func (f *FlagSet) IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
 	p := new(net.IPMask)
 	f.IPMaskVarP(p, name, shorthand, value, usage)
@@ -80,7 +116,7 @@ func IPMask(name string, value net.IPMask, usage string) *net.IPMask {
 	return CommandLine.IPMaskP(name, "", value, usage)
 }
 
-// Like IP, but accepts a shorthand letter that can be used after a single dash.
+// IPMaskP is like IP, but accepts a shorthand letter that can be used after a single dash.
 func IPMaskP(name, shorthand string, value net.IPMask, usage string) *net.IPMask {
 	return CommandLine.IPMaskP(name, shorthand, value, usage)
 }