[Enhancement/Support] HTTP feature "Transition feature for backward compatibility"

[pgfeller]

I've noted, that with a new OH 4.2 installation the http karaf feature is not part of the default setup anymore:

http | 8.0.27 | | Uninstalled | standard-4.4.6 | Transition feature for backward compatibility

As the feature is marked as transitional it might be a documentation issue after all (then please transfer to doc repository - and I'll follow up). I use http to make my interactive grafana charts available to OH phone/remote application:

openhab> http:proxy-list                                                                                                                                                                                                       
URL      │ ProxyTo                                  │ Balancing Policy
─────────┼──────────────────────────────────────────┼─────────────────
/grafana │ https://openhab.home:3000/grafana │

Of course this needs proper SSL setup etc. to work - but might be worth a docu page as well ...

Environment

Clean installation of OH 4.2:

Installation (📦 Docker container)

                           _   _     _     ____  
   ___   ___   ___   ___  | | | |   / \   | __ ) 
  / _ \ / _ \ / _ \ / _ \ | |_| |  / _ \  |  _ \ 
 | (_) | (_) |  __/| | | ||  _  | / ___ \ | |_) )
  \___/|  __/ \___/|_| |_||_| |_|/_/   \_\|____/ 
       |_|       4.2.0 - Release Build
Use '' for a list of available commands

and '[cmd] --help' for help on a specific command.

To exit, use '' or 'logout'.
openhab> info

Karaf

Karaf version               4.4.6

Karaf home                  /openhab/runtime

Karaf base                  /openhab/userdata

OSGi Framework              org.eclipse.osgi-3.18.0.v20220516-2155
JVM

Java Virtual Machine        OpenJDK 64-Bit Server VM version 17.0.11+9-Debian-1deb11u1

Version                     17.0.11

Vendor                      Debian

Pid                         203

Uptime                      2 hours 35 minutes

Process CPU time            3 minutes

Process CPU load            0.00

System CPU load             0.12

Open file descriptors       203

Max file descriptors        1,048,576

Total compile time          1 minute

Threads

Live threads                118

Daemon threads              58

Peak                        202

Total started               3114

Memory

Current heap size           276,990 kbytes

Maximum heap size           4,005,888 kbytes

Committed heap size         475,136 kbytes

Pending objects             0

Garbage collector           Name = 'G1 Young Generation', Collections = 36, Time = 0.434 seconds

Garbage collector           Name = 'G1 Old Generation', Collections = 0, Time = 0.000 seconds

Classes

Current classes loaded      20,045

Total classes loaded        20,223

Total classes unloaded      178

Operating system

Name                        Linux version 6.5.0-44-generic

Architecture                amd64

Processors                  8

Total physical memory       16,019,212 kbytes

Free physical memory        741,408 kbytes

Expected Behavior

➡️ for 4.2 this is not an issue, as I can install the transition http feature manually; but it would be great if the proxy feature would be part of the default installation.

Information about the current way to do this would be appreciated as well. If desired I can then open a documentation issue and create docu about that feature - as in my opinion it is very powerful to integrate grafana, frontail, etc ... into the UI (using the interactive grafana widgets).