Run test only when idn is available
Run test only when idn is available

IDN is not installed on all machines making the unit test execution fail on those without. Let's make IDN thus a pre-requirement for the text execution.

sharidas/core,sharidas/core,andreas-p/nextcloud-server,pmattern/server,pmattern/server,xx621998xx/server,Ardinis/server,sharidas/core,whitekiba/server,IljaN/core,whitekiba/server,bluelml/core,pixelipo/server,cernbox/core,andreas-p/nextcloud-server,pollopolea/core,xx621998xx/server,nextcloud/server,pmattern/server,pollopolea/core,pixelipo/server,endsguy/server,IljaN/core,phil-davis/core,endsguy/server,pixelipo/server,nextcloud/server,pixelipo/server,cernbox/core,endsguy/server,pollopolea/core,endsguy/server,Ardinis/server,jbicha/server,cernbox/core,pollopolea/core,IljaN/core,michaelletzgus/nextcloud-server,bluelml/core,pmattern/server,michaelletzgus/nextcloud-server,michaelletzgus/nextcloud-server,bluelml/core,jbicha/server,xx621998xx/server,andreas-p/nextcloud-server,owncloud/core,endsguy/server,cernbox/core,whitekiba/server,Ardinis/server,cernbox/core,IljaN/core,pixelipo/server,bluelml/core,xx621998xx/server,andreas-p/nextcloud-server,Ardinis/server,Ardinis/server,xx621998xx/server,owncloud/core,whitekiba/server,andreas-p/nextcloud-server,whitekiba/server,owncloud/core,pollopolea/core,owncloud/core,bluelml/core,sharidas/core,michaelletzgus/nextcloud-server,nextcloud/server,nextcloud/server,IljaN/core,sharidas/core,pmattern/server,owncloud/core,jbicha/server,jbicha/server,jbicha/server