Move documentation folder to individual READMEs

plugins/ipam/dhcp/README.md

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+# dhcp plugin
+
+## Overview
+
+With dhcp plugin the containers can get an IP allocated by a DHCP server already running on your network.
+This can be especially useful with plugin types such as [macvlan](../../main/macvlan/README.md).
+Because a DHCP lease must be periodically renewed for the duration of container lifetime, a separate daemon is required to be running.
+The same plugin binary can also be run in the daemon mode.
+
+## Operation
+To use the dhcp IPAM plugin, first launch the dhcp daemon:
+
+```
+# Make sure the unix socket has been removed
+$ rm -f /run/cni/dhcp.sock
+$ ./dhcp daemon
+```
+
+Alternatively, you can use systemd socket activation protocol.
+Be sure that the .socket file uses /run/cni/dhcp.sock as the socket path.
+
+With the daemon running, containers using the dhcp plugin can be launched.
+
+## Example configuration
+
+```
+{
+	"ipam": {
+		"type": "dhcp",
+	}
+}
+
+## Network configuration reference
+
+* `type` (string, required): "dhcp"