ansible: Adding LOGDIR into edeploy.conf

This is very useful to have a default LOGDIR configuration. Associated
to UPLOAD_LOG=1, this allow servers uploading their logfile on the
edeploy server.

Particulary useful if server failed to deploy, reading the log is
enough, no need to ssh the server itself.
ansible: Updating default edeploy config file

The options were deprecated, let's put the new one that can be adjusted
if needed.
pxe: Adding "other=x" in IP= setting

While defining the IP= it could be useful to detail one configuration
but tell that all others shall be the same like:

IP=eth0:dhcp,other:none

The eth0 will be using dhcp while all other interfaces will be not
configured.

Possible values for other are :
- none
- dhcp

Of course, the static mode doesn't have any meaning here.