[Ddclient-support] [ddclient/ddclient] 8b2ede: Revert "Add is_ipv4() and ipv4_match() functions"

[Richard H. <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/ddclient/ddclient
  Commit: 8b2ede16c081da943be9e6bd5cbb5f11e702b0a7
      https://github.com/ddclient/ddclient/commit/8b2ede16c081da943be9e6bd5cbb5f11e702b0a7
  Author: Richard Hansen <rh...@rh...>
  Date:   2020-06-28 (Sun, 28 Jun 2020)

  Changed paths:
    M ddclient

  Log Message:
  -----------
  Revert "Add is_ipv4() and ipv4_match() functions"

Broke `ip=<IPv4 address>`.

This reverts commit 0caed7ca2a32187ca62d2051f21021f036e98d66.