Recommended changes from review of #1568

- Make Resources an `interface{}` to support arbitrary yaml
- Remove `wwctl resource` as incompatible with arbitrary yaml
- Revert changes to host overlay templates
- Remove NFS mount options from warewulf.conf
- Replace NFS support / resource prefix with "fstab" resource
- Move resources to profiles
- Migrate warewulf.conf mounts to nodes.conf with `wwctl upgrade`
- Add documentation

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

CHANGELOG.md

@@ -34,7 +34,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - New "localtime" overlay to define the system time zone. #1303
 - Add support for nested profiles. #1572, #1598
 - Adds `wwctl container <exec|shell> --build=false` to prevent automatically (re)building the container. #1490, #1489
-- Added resource as global variable for templates
+- Added resources as generic, arbitrary YAML data for nodes and profiles. #1568
+- New `fstab` resource configures mounts in fstab overlay, including NFS mounts. #515
 
 ### Changed
 
@@ -102,6 +103,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Remove `wwctl kernel` #1556
 - Remove `wwctl <node|profile> <add|set> --kerneloverride` #1556
 - Remove `wwctl container <build|import> --setdefault` #1335
+- Remove NFS mount options from warewulf.conf. #515
 
 ### Fixed