Adjust ports depending on expired versions of OpenJDK:
- biology/snpeff: 12+ -> 11+
- devel/RStudio: 12 -> 11
- www/closure-compiler: 13 -> 11+
Allow java/openjdk17 to use java/openjdk17-bootstrap on i386
too, this builds just fine on 13.1-i386
Remove jdk12-doc as it is no longer relevant.
Clean up Java version calculations in bsd.java.mk