Revert "Merge pull request #2339 from phyber/iptables-check"

[arkodg]

This reverts commit 820deef, reversing
changes made to 19e372a.

[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "revert-iptables-docker-user" [email protected]:arkodg/libnetwork.git somewhere
$ cd somewhere
$ git commit --amend -s --no-edit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.

[mavenugo]

Thanks @arkodg. LGTM

[arkodg]

PTAL @euanh @selansen

[arkodg]

cc: @thaJeztah

[selansen]

LGTM

[thaJeztah]

This reverts #2339 controller: Check if IPTables is enabled for arrangeUserFilterRule

• re-opens dockerd when run with --iptables=false modifies iptables by adding DOCKER-USER #2158 dockerd when run with --iptables=false modifies iptables by adding DOCKER-USER
• re-opens With iptables=false dockerd still creates DOCKER-USER chain and rules moby#35777 With iptables=false dockerd still creates DOCKER-USER chain and rules
• re-opens dockerd --iptables=false adds DOCKER-USER chain and modify FORWARD chain anyway docker/for-linux#136 dockerd --iptables=false adds DOCKER-USER chain and modify FORWARD chain anyway