update Rosetta easyblock to take into account that $LD_LIBRARY_PATH, $CPATH, $PATH may not be defined ( #2744).make VEP easyblock compatible with -sanity-check-only ( #2743).disable altivec when building FFTW versions
show URLs used for download attempts in trace output ( #4026).allow searching for sources/patches in alternative location by specifying ‘ alt_location’ in source/patch spec ( #3994).