skip build with any combination of "skip" and "ci"
skip build with any combination of "skip" and "ci"

a commit message containing any case-insensitive variant
of the above two words wrapped in square brackets will skip the build.

examples: [ci skip], [skip CI]

this reintroduces pr #1134 and additionally logs the matched
skip instruction.

msteinert/drone,mvdkleijn/drone,carnivalmobile/drone,Dataman-Cloud/drone,cdaguerre/drone,NamPNQ/drone,donatj/drone,Ablu/drone,cdaguerre/drone,vaijab/drone,nils-werner/drone,carnivalmobile/drone,msteinert/drone,flyinprogrammer/drone,vaijab/drone,veghead/drone,veghead/drone,jackspirou/drone,NamPNQ/drone,bsauvajon/drone,masarakki/drone,zaro0508/drone,Ablu/drone,lins05/drone,bsauvajon/drone,fracting/drone,carnivalmobile/drone,vtolstov/drone,mvdkleijn/drone,crhym3/drone,vtolstov/drone,nils-werner/drone,chlorm-forks/drone,jackspirou/drone,donatj/drone,jdamick/drone,fracting/drone,lins05/drone,masarakki/drone,jackspirou/drone,benschumacher/drone,jdamick/drone,chlorm-forks/drone,msteinert/drone,donatj/drone,mvdkleijn/drone,zaro0508/drone,benschumacher/drone,flyinprogrammer/drone,crhym3/drone,Dataman-Cloud/drone,Dataman-Cloud/drone,zaro0508/drone,fracting/drone,zaro0508/drone,flyinprogrammer/drone,mvdkleijn/drone,Ablu/drone,crhym3/drone,cdaguerre/drone,nils-werner/drone