datapath: add linux/flow_{table, netlink}.c to .gitignore

Signed-off-by: Lorand Jakab <lojakab@cisco.com>
Acked-by: Kyle Mestery <kmestery@cisco.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
ovs-lib: Revert "Return the exit status of ovs-ctl in ovs_ctl()."

This reverts commit 9d46457e07ca which had a side-effect that
ssh executing start/restart command on a remote machine would
hang as one of the file descriptors created in that commit
was getting passed along to the daemons. The daemons weren't closing
it and hence ssh would just wait for them to close and hang.

Signed-off-by: Gurucharan Shetty <gshetty@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
ovs-controller: Avoid dereferencing NULL pointer when the switch acts as a hub

Starting ovs-controller with '-H' option will lead to a segment fault problem.
Add a check, and adjust the indentation of the following code.

Signed-off-by: ZhengLingyun <konghuarukhr@163.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>