8173777: Merge javac -Xmodule into javac--patch-module
Summary: Merging -Xmodule: functionality into --patch-module.
Reviewed-by: jjg, mchung, rfield

8169069: Module system implementation refresh (11/2016)
Reviewed-by: mcimadamore, jjg, mchung, anazarov
Contributed-by: jonathan.gibbons@oracle.com, jan.lahoda@oracle.com, alan.bateman@oracle.com, mandy.chung@oracle.com, bhavesh.x.patel@oracle.com, andrey.x.nazarov@oracle.com

8169447: javac should detect/reject repeated use of --patch-module on command line
Reviewed-by: jlahoda

8136930: Simplify use of module-system options by custom launchers
8160489: Multiple -Xpatch lines ignored by javac
8156998: javac should support new option -XinheritRuntimeEnvironment
Reviewed-by: jlahoda, ksrini