Add support for DNS options

Signed-off-by: Tim Hockin <thockin@google.com>

docs/reference/commandline/create.md

@@ -31,6 +31,7 @@ Creates a new container.
       --cpuset-mems=""              Memory nodes (MEMs) in which to allow execution (0-3, 0,1)
       --device=[]                   Add a host device to the container
       --dns=[]                      Set custom DNS servers
+      --dns-opt=[]                  Set custom DNS options
       --dns-search=[]               Set custom DNS search domains
       -e, --env=[]                  Set environment variables
       --entrypoint=""               Overwrite the default ENTRYPOINT of the image

docs/reference/commandline/daemon.md

@@ -23,6 +23,7 @@ weight=1
       --default-gateway=""                   Container default gateway IPv4 address
       --default-gateway-v6=""                Container default gateway IPv6 address
       --dns=[]                               DNS server to use
+      --dns-opt=[]                           DNS options to use
       --dns-search=[]                        DNS search domains to use
       --default-ulimit=[]                    Set default ulimit settings for containers
       -e, --exec-driver="native"             Exec driver to use

docs/reference/commandline/run.md

@@ -30,6 +30,7 @@ weight=1
       -d, --detach=false            Run container in background and print container ID
       --device=[]                   Add a host device to the container
       --dns=[]                      Set custom DNS servers
+      --dns-opt=[]                  Set custom DNS options
       --dns-search=[]               Set custom DNS search domains
       -e, --env=[]                  Set environment variables
       --entrypoint=""               Overwrite the default ENTRYPOINT of the image