Werk #15621: check_http: Fix Option Enforce IPv4

Component	Checks & agents
Title	check_http: Fix Option Enforce IPv4
Date	May 31, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.2.0p2 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p29 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The option Enforce IPv4 of the rule Check HTTP service did not enforce IPv4. With this Werk, Enforce IPv4 adds the option '-4' to the service check command. Existing rules are migrated to the new option Use any network address. Thus, their behaviour does not change.

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