menu-force and menu-hidden were added in97f077df05, menu-disable was added in6efdd7fec5, a year later. So we can assume that if the feature flag is set, the other string values are supported too. The comment that there's no way check that was added later in5b45fad4fc, but it was incorrect even at that time. Fixes https://github.com/systemd/systemd/issues/39167. As described in the issue, we documented various string values in the BLI, but bootctl didn't use the string values. At the time menu-force and menu-hidden were added, using numerical values for compatibility made sense. But that stopped being needed when a string value that didn't have a strictly equivalent numerical value and a feature flag were added. When converting a large number to menu-force, message is downgraded to debug, since the severity of the issue is very minor. Debug messages are added in other places when the requested setting is modified too.
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