Werk #7983: Fix registering GUI commands with old multisite_commands

Component User interface
Title Fix registering GUI commands with old multisite_commands
Date Jul 22, 2019
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.6.0b4 2.0.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The command registration API has changed with 1.6, but the 1.5 API should still work as before for some time. This compatibility layer has been fixed now.

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