In mkdirs.sh, make SDP perms configurable 600/640/644 or 700/750/755.
Make the SDP degree of control over new instances somewhat
configurable. Currently, thing are hard-coded as 700 for executable
files or directories, and 600 for anyting else. Expand the
possible set of perms to be:
700/750/755 for executable files and directories.
600/640/600 for non-executable files.