cmdv4-args and cmdv6-args options

[rmunn]

While trying to resolve #635 which I was running into (my Dynu IP was incorrectly getting set to 1.0.1.1), I tried adding this to my ddclient.conf file:

usev4=cmdv4, cmdv4='curl -fs http://ipv4.icanhazip.com/'

But ddclient tried to interpret that whole thing as a command: I got the error sh: line 1: curl -fs http://ipv4.icanhazip.com/: No such file or directory. I haven't found any documented way to pass arguments to the command specified in the cmdv4/cmdv6 options.

Obviously I can put together a one-liner get-ipv4.sh shell script that calls curl with appropriate arguments. But it would be nice to be able to specify a command and arguments via the cmdv4 and cmdv6 options, and not have to use the indirection of a shell script.

Would it be feasible to add cmdv4-args and cmdv6-args options to ddclient? Or is "just throw together a wrapper shell script" the intended resolution, similar to how cmd-skip was deprecated in favor of doing the parsing/filtering in a wrapper script?