restore previous behaviour on e.g. base packages

git-svn-id: https://svn.r-project.org/R/trunk@62880 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks

git-svn-id: https://svn.r-project.org/R/trunk@62882 00db46b3-68df-0310-9c12-caf00c1e9a41
Encode names in error messages, so printing control chars in names doesn't mess up the message.

git-svn-id: https://svn.r-project.org/R/trunk@62883 00db46b3-68df-0310-9c12-caf00c1e9a41
more tweaks

git-svn-id: https://svn.r-project.org/R/trunk@62884 00db46b3-68df-0310-9c12-caf00c1e9a41
fix up DM change for now

git-svn-id: https://svn.r-project.org/R/trunk@62885 00db46b3-68df-0310-9c12-caf00c1e9a41
skip registration checks unless package is installed

git-svn-id: https://svn.r-project.org/R/trunk@62886 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks

git-svn-id: https://svn.r-project.org/R/trunk@62887 00db46b3-68df-0310-9c12-caf00c1e9a41
tweaks

git-svn-id: https://svn.r-project.org/R/trunk@62888 00db46b3-68df-0310-9c12-caf00c1e9a41