The `wwctl overlay parse -n NODE FILE` will interpret the given overlay file and print it stdout, via wwlog.PRINTF.
The overlay code had to be refactored for this, but hopefully this makes the code a bit more readable. Also the tstruct has not its own initilization code.
* Combine provision response handling, add hwaddr and interface to dhcp
* Simplify stage cases, add backward compatible uri parse
* Move control of image compression to client
* Fix kernel search path for ubuntu, buffer template generation
* Implement cpio and gz as functions, add log named functions
* Generalize fs image creation routine
* Combine daemonLogf to generalized wwlog
* Fix template newline insertion, update dhcp and hosts tmpl
* Update IPXE template to handle non-compressed files
* Update DHCP template to set network interfaces and server IP assignment
* Update DHCP/hosts templates to choose a host-name self-consistently
uid/gid are not synced at container import but checked. An apropriate
message is printed, regarding users which are not present on host.
The `wwctl container syncuser` needs the `--write` switch to actually
write to the container.
The command `wwctl container syncuser` will always operate at the
container level, but as the 'generic` overlay reads in the container
passwd/group, following two steps will update the passwd/group on a
running cluster:
1. Add passwd/group to container
wwctl container syncuser --write CONTAINER
2. Synchronize overlay
wwctl overlay build -N
Every network in the profile and for the nodes can have induvidual keys values
pairs, called Tags, which are propergated to the templates. So they can be used
for things like MTU size like
`wwct node set node01 --nettag mtu=9000`
and in in ifcfg.xml.ww
```
{{ if $netdev.Tags.mtu -}}
<mtu> {{ $netdev.Tags.mtu }} </mtu>
{{ end -}}
```
