JDK 15 RFR of 8225495: Note whether returned annotations are declaration annotations or type annotations, take 2

[Joe Darcy]

Hello,

Please review a second iteration of the fix for

     8225495: Note whether returned annotations are declaration 
annotations or type annotations
     http://cr.openjdk.java.net/~darcy/8225495.1/

In response to previous feedback [1], I made additional ties between the 
javadoc specs and the JLS. Also, a note was added to 
Elements.getAllAnnotationMirrors.

As an RFE for the inline @jls tag, if there was a "@jlsPlain" tag 
allowed linkage without displaying the section numbers, I would have 
used that in a few locations in this changeset.

Thanks,

-Joe

[1] 
https://mail.openjdk.java.net/pipermail/compiler-dev/2019-June/013455.html