nshlib:  Move trim_dir() and foreach_direntry() from nsh_fscmds.c to nsh_fsutils.c as nsh_trimdir() and nsh_foreach_direntry(), respectively

nshlib: Use CONFIG_NSH_PROC_MOUNTPOINT instead of literal /proc; Move readfile() from nsh_proccmds.c to nsh_fsutils.c as nsh_readfile()

apps/nshlib: Remove all references to internal OS interface netdev_foreach().  Logic in ifconfig, ifup, and ifown now use the procfs file system to examine networking status.

nshlib/:  ifconfig now uses /proc/net/eth0 to display network configuration.  You will need to enable the procfs file system in order to use ifconfig

apps/nshlib:  The 'ifconfig' command now uses /proc/net/stat to show network statistics.  A consequence of this is that you cannot view network statistics if the procfs is not enabled and mounted at /proc

NSH no long calls losetup() and loteardown() directly.  Now it uses /dev/loop and performs these operations using ioctl() calls

If CONFIG_LIBC_LOCALTIME or CONFIG_TIME_EXTENDED are defined, then the NSH date command should also show the day ofo the week

examples/serialrx: Don't print 'Received:\n' before printing bytes received

examples/serialrx: Add configuration options to print the bytes received

mksmartfs: Move into apps/fsutils from kernel, now uses only open and ioctl.  Add configuration option to supported multiple root directories.  From Ken Petit

examples/smart-test:  Adds a circular log type test for SMARTFS wear level code testing.  From Ken Petit

nshlib: Now that NuttX automatically converts block to character devices, the implemention of the DD command no longer has to muck with block to character conversion

drivers/mtd/smart.c  Fixed SmartFS wear level error that occurs when the logical sector size is too small to save all wear level status bytes in a single sector.  Logical sectors 1 and 2 were simply not being allocated and then the read_sector and write_sector routines were failing.  From Ken Petit

Uavcan

Nucleo F303RE: Move C++ initialization from configs to apps/platform