allow newlines in the contents when doing -F "var=[contents]"

  should give up, so curl returns with exit code 0. Test case 162 added to

  verify the functionality.

- allow newlines in the contents when doing -F "var=[contents]"

  Robert Marlow reported.

- If a transfer is found out to be only partial, libcurl will now treat that

  as a problem serious enough to skip the final QUIT command before closing

  the control connection. To avoid the risk that it will "hang" waiting for