USB serial driver Kconfig: Select default sizes for serial buffers so that the can hold even multiples of the max packet size.

Also added warnings:  There are some concurrency issues in the current implementation if you try to modify the procfs data structures will the procfs is mounted and possibly busy.

s/procfs:  The procfs file system can now be configured so that it supports a runtime registration of procfs entries with CONFIG_FS_PROCFS_REGISTER=y

Remove CONFIG_NET_PINGADDRCONF.  This was a uIP way of assigning IP addresses, but is not standard and not a appropriate feature in general.

Fixed error with temperature computation

fs/procfs:  Process status now includes task flags.  Some strings modified to improved 'ps' command output

sched/pthread/: CRITICAL BUGFIX: Logic was wiping out the indication that of the type of a pthread.  Hence, it could be confused as a task.  Found because this was causing a crash when /proc/nnn/cmdline was printed.

net/: Move net_procfs.c to net/procfs/.  Partition logic a little better to make space to support net device procfs as well