8028318: [doclint] doclint will reject existing user-written doc comments using custom tags that follow the recommended rules Reviewed-by: darcy

-class
-classload
-compiler
-gc
-gccapacity
-gccause
-gcmetacapacity
-gcnew
-gcnewcapacity
-gcold
-gcoldcapacity
-gcutil
-printcompilation