[Rd] CRAN packages with invalid maintainer address

[Kurt Hornik]

Emails to

   Edgar Acuna <edgar at cs.uprm.edu>,
   Federico C. F. Calboli <f.calboli at ucl.ac.uk>,
   Hao Wu <hao at jax.org>,
   Lopaka Lee <rlee at fpcc.gov>,
   Maria Kocherginsky <mkocherg at uchicago.edu>,

as maintainers of CRAN packages with QC problems that need addressing
for the upcoming 2.3.0 release failed yesterday.

If you are one of these, or know how to reach these, pls let me know.

-k