[18.09] backport default-addr-pool-mask-length param max value check

[thaJeztah]

backport of moby#37736 and moby#37949 for 18.09

git checkout -b 18.09_backport_addr_pool ce-engine/18.09
git cherry-pick -s -S -x 148ff00a0a800fad99de11ee3021d4c5d4869157
git cherry-pick -s -S -x d25c5df80e60cdbdc23fe3d0e2a6808123643dc7

conflict in daemon/cluster/noderunner.go and vendor.conf, due to #60, which is not in upstream

diff --cc daemon/cluster/noderunner.go
index 071d8af5a7,aa905d6780..0000000000
--- a/daemon/cluster/noderunner.go
+++ b/daemon/cluster/noderunner.go
@@@ -13,7 -13,7 +13,11 @@@ import 
        "github.com/docker/docker/daemon/cluster/executor/container"
        lncluster "github.com/docker/libnetwork/cluster"
        swarmapi "github.com/docker/swarmkit/api"
++<<<<<<< HEAD
 +      "github.com/docker/swarmkit/manager/allocator/cnmallocator"
++=======
+       swarmallocator "github.com/docker/swarmkit/manager/allocator/cnmallocator"
++>>>>>>> 148ff00a0a... Global Default AddressPool - Update
        swarmnode "github.com/docker/swarmkit/node"
        "github.com/pkg/errors"
        "github.com/sirupsen/logrus"
@@@ -122,7 -122,7 +126,11 @@@ func (n *nodeRunner) start(conf nodeSta
                ListenControlAPI:   control,
                ListenRemoteAPI:    conf.ListenAddr,
                AdvertiseRemoteAPI: conf.AdvertiseAddr,
++<<<<<<< HEAD
 +              NetworkConfig: &cnmallocator.NetworkConfig{
++=======
+               NetworkConfig: &swarmallocator.NetworkConfig{
++>>>>>>> 148ff00a0a... Global Default AddressPool - Update
                        DefaultAddrPool: conf.DefaultAddressPool,
                        SubnetSize:      conf.SubnetSize,
                },
diff --cc vendor.conf
index d6a41a3759,6070edbac6..0000000000
--- a/vendor.conf
+++ b/vendor.conf

[thaJeztah]

ping @selansen PTAL

[selansen]

Little confused here. half of moby#37736 changes already in due to #60 but few changes are missing.
When I looked into the code, I noticed most of my changes are present and notified @andrewhsu that my changes are already present in 18.09. wondering how did rest of the changes got missed out. Anyways thanks for porting these PRs.

[selansen]

LGTM

[thaJeztah]

yes it would've been easier if #60 cherry-picked the upstream changes, but it was merged already, so I decided to just fix the conflicts

[tiborvass]

LGTM