NSH network initialization:  Do not set the IP address for 6loWPAN.  The 6loWPAN stack uses IP address that derive from the ieee 802.15.4 addressing and cannot be (safely) configured by the user.

NSH: Fix some ieee 802.15.4 initialization logic.  It should not set the saddr or panid; those cannot be hard-coded but must come from the coordinator.

wireless/ieee802154: Rewrites i8sak to be test CLI for IEEE 802.15.4 MAC layer

Approved-by: Gregory Nutt <gnutt@nuttx.org>

remove extra semicolons

Approved-by: Gregory Nutt <gnutt@nuttx.org>

The dedicated windows tool at APPSDIR/tools/mkkconfig.bat uses , which is not a windows shell variable, and is left uninitialized, but in fact should be the current directory.

nshlib: Fix a resource leak in cmd_hexdump()

Approved-by: Gregory Nutt <gnutt@nuttx.org>

apps/nshlib:  Add a new option CONFIG_NSH_NETLOCAL that will suppress some built in operations and will support manual configuration of a wireless network

Jira: PDFW15IS-265
Coverity-ID: 10786
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

Ensure netlib will not be broken when setip will not bring the network up anymore

Approved-by: Gregory Nutt <gnutt@nuttx.org>