Update status; remove one defunct mirror where maintainer address fails too.

git-svn-id: https://svn.r-project.org/R/trunk@67214 00db46b3-68df-0310-9c12-caf00c1e9a41
Improve checking CRAN mirrors.

git-svn-id: https://svn.r-project.org/R/trunk@67215 00db46b3-68df-0310-9c12-caf00c1e9a41
New format for check log summaries.

git-svn-id: https://svn.r-project.org/R/trunk@67216 00db46b3-68df-0310-9c12-caf00c1e9a41
Cosmetics.

git-svn-id: https://svn.r-project.org/R/trunk@67217 00db46b3-68df-0310-9c12-caf00c1e9a41
Document and export check_packages_in_dir_changes().

git-svn-id: https://svn.r-project.org/R/trunk@67218 00db46b3-68df-0310-9c12-caf00c1e9a41
Missed in c67216.

git-svn-id: https://svn.r-project.org/R/trunk@67219 00db46b3-68df-0310-9c12-caf00c1e9a41