fix case-insensitive search detection
fix case-insensitive search detection

mwengren/pycsw,PublicaMundi/pycsw,ckan-fcd/pycsw-fcd,tomkralidis/pycsw,ingenieroariel/pycsw,benhowell/pycsw,bukun/pycsw,mwengren/pycsw,kevinpdavies/pycsw,ricardogsilva/pycsw,ckan-fcd/pycsw-fcd,tomkralidis/pycsw,geopython/pycsw,ocefpaf/pycsw,ricardogsilva/pycsw,bukun/pycsw,rouault/pycsw,ocefpaf/pycsw,geopython/pycsw,geopython/pycsw,ricardogsilva/pycsw,ingenieroariel/pycsw,kalxas/pycsw,tomkralidis/pycsw,PublicaMundi/pycsw,bukun/pycsw,kevinpdavies/pycsw,benhowell/pycsw,kalxas/pycsw,kalxas/pycsw,rouault/pycsw