apidocs: relocate over-eager command checks into conditional branch #1478
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Fix some over-eager
commandexistence checks affecting Debian packaging routines usingDOXYGEN_USE_CURRENT=1andDOXYGEN_ANY_VERSION=1, wheremktempmay not be available.mktemp(and other commands being checked) are only required whenDOXYGEN_USE_CURRENTis not enabled. Also changes the-vto-Vso a diagnostic message is emitted when the command is not found (no output on success).