Possibly a bug identified by Radford Neal as "a problem in R_AllocStringBuffer that could result in a crash due to an invalid memory access"

git-svn-id: https://svn.r-project.org/R/trunk@66017 00db46b3-68df-0310-9c12-caf00c1e9a41
Potential protection error from Radford Neal:  "Fixed lack of protection bugs in the equal and greater functions in sort.c."

git-svn-id: https://svn.r-project.org/R/trunk@66019 00db46b3-68df-0310-9c12-caf00c1e9a41
Bugs found by Radford Neal:  "Fixed lack of protection bugs in the D function in deriv.c."

git-svn-id: https://svn.r-project.org/R/trunk@66021 00db46b3-68df-0310-9c12-caf00c1e9a41
get/setGraphicsEventEnv didn't validate arguments properly.  Found by Radford Neal.  (Not the same patch as in pqR, which validated at the C level but did not coerce other numeric types to integer).

git-svn-id: https://svn.r-project.org/R/trunk@66023 00db46b3-68df-0310-9c12-caf00c1e9a41
stress utf8 is not a valid encoding name

git-svn-id: https://svn.r-project.org/R/trunk@66025 00db46b3-68df-0310-9c12-caf00c1e9a41
r66013 interfered with r66011.  This should let both work.

git-svn-id: https://svn.r-project.org/R/trunk@66027 00db46b3-68df-0310-9c12-caf00c1e9a41
more on Matlab date-times

git-svn-id: https://svn.r-project.org/R/trunk@66029 00db46b3-68df-0310-9c12-caf00c1e9a41