illumos gate

Following issues will be addressed on behalf of this ticket:

• move default location of ndmp debug log from /var/ndmp to /var/log/ndmp
• fix inaccurate information in NDMP man pages
• introduce new -f option for ndmpd to run in foreground (for easier debugging)
• fix double free when NDMP SMF property is read but isn't defined
• modify ndmpd's startup code to print error message to stderr until it is daemonized
• strictly use syslog for all messages after ndmpd's has been daemonized
• set umask to safe value (0 -> 077)
• avoid loading plugin if plugin path is empty string (eliminates spurious error message)
• set plugin path to empty string by default (currently there isn't any plugin)
• add existing debug-mode command line option among SMF properties