Merge FMIL `2.0.x` branch into trunk for #3825.
Merge FMIL `2.0.x` branch into trunk for #3825, updating all mergeinfo (only mergeinfo of trunk was updated in r6580 for some reason).
#211 (https://trac.fmi-standard.org/ticket/211): fixed "required" attribute for "numberOfEventIndicators" call in parsing. Delivers "0" if tag not present.
#3866: replaced wrong function references.
#3866: replaced wrong function references.