disable leading/trailing intron joining
disable leading/trailing intron joining

This function has some problems with genes that indeed _do_ have
legitimate introns in partial genes, e.g. in apicoplexans.

sanger-pathogens/annot-nf,satta/annot-nf,satta/annot-nf,sanger-pathogens/companion,sanger-pathogens/companion,satta/companion,satta/annot-nf,sanger-pathogens/annot-nf,sanger-pathogens/companion,satta/companion,satta/companion,sanger-pathogens/annot-nf