8179889: Fix typographic errors in copyright headers
Reviewed-by: erikj, dholmes

8176572: Javac does not enforce module name restrictions
Reviewed-by: jlahoda

8170987: Module system implementation refresh (12/2016)
Reviewed-by: mcimadamore
Contributed-by: jonathan.gibbons@oracle.com, jan.lahoda@oracle.com, srikanth.adayapalam@oracle.com, alan.bateman@oracle.com, mandy.chung@oracle.com