settable FLEX and BISON, some cleanup
settable FLEX and BISON, some cleanup

petere/plproxy-dev,mpihlak/plproxy-dev,markokr/plproxy-dev,saaros/plproxy-dev,saaros/plproxy-dev,myrkraverk/plproxy,nad2000/plproxy,markokr/plproxy-dev