docs: smart proxy BMC providers additional info

Add redfish BMC provider.

Make provider dependencies explicit.

Verified on 3.12.x and 3.13.x

_includes/manuals/3.12/4.3.3_smartproxy_bmc.md

@@ -8,8 +8,9 @@ Activate the BMC management module within the Smart Proxy instance.  This allows
 
 Available providers are:
 
-* `freeipmi` - for IPMI control using the freeipmi implementation
-* `ipmitool` - using the ipmitool implementation
+* `freeipmi` - for IPMI control using the freeipmi implementation. Requires [freeipmi](https://www.gnu.org/software/freeipmi) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `ipmitool` - using the ipmitool implementation. Requires [ipmitool](https://github.com/ipmitool/ipmitool) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `redfish` - using [redfish_client](https://rubygems.org/gems/redfish_client) Ruby gem implementation. The gem should be installed by default. 
 * `shell` - specialized provider for controlling the proxy server itself (used for Foreman Discovery)
 * `ssh` - simple provider via SSH command `shutdown` with limited functionality (poweron does not work)
 

_includes/manuals/3.13/4.3.3_smartproxy_bmc.md

@@ -8,8 +8,9 @@ Activate the BMC management module within the Smart Proxy instance.  This allows
 
 Available providers are:
 
-* `freeipmi` - for IPMI control using the freeipmi implementation
-* `ipmitool` - using the ipmitool implementation
+* `freeipmi` - for IPMI control using the freeipmi implementation. Requires [freeipmi](https://www.gnu.org/software/freeipmi) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `ipmitool` - using the ipmitool implementation. Requires [ipmitool](https://github.com/ipmitool/ipmitool) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `redfish` - using [redfish_client](https://rubygems.org/gems/redfish_client) Ruby gem implementation. The gem should be installed by default. 
 * `shell` - specialized provider for controlling the proxy server itself (used for Foreman Discovery)
 * `ssh` - simple provider via SSH command `shutdown` with limited functionality (poweron does not work)
 

_includes/manuals/nightly/4.3.3_smartproxy_bmc.md

@@ -8,8 +8,9 @@ Activate the BMC management module within the Smart Proxy instance.  This allows
 
 Available providers are:
 
-* `freeipmi` - for IPMI control using the freeipmi implementation
-* `ipmitool` - using the ipmitool implementation
+* `freeipmi` - for IPMI control using the freeipmi implementation. Requires [freeipmi](https://www.gnu.org/software/freeipmi) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `ipmitool` - using the ipmitool implementation. Requires [ipmitool](https://github.com/ipmitool/ipmitool) and [rubyipmi](https://rubygems.org/gems/rubyipmi) Ruby gem.
+* `redfish` - using [redfish_client](https://rubygems.org/gems/redfish_client) Ruby gem implementation. The gem should be installed by default. 
 * `shell` - specialized provider for controlling the proxy server itself (used for Foreman Discovery)
 * `ssh` - simple provider via SSH command `shutdown` with limited functionality (poweron does not work)