Summary: Cleanup of javadoc -Xlint errors
Reviewed-by: lancea, mduigou, darcy, mullan, mchung

Summary: Convert javadoc <code>...</code> and <tt>...</tt> tags to {@code ...}
Reviewed-by: darcy

Reviewed-by: lancea, chegar, psandoz

Reviewed-by: dholmes

Reviewed-by: wetmore

Reviewed-by: darcy, weijun

Reviewed-by: alanb