apps/graphics/pdcurses: Add dummy files with placeholders for the logic that needs to be implemented to integrated pdcurses with NuttX.

apps/graphics/pdcurs34:  This commit brings the basic public domain pdcurses library into NuttX.  This library is complete but not yet usuable because it still requires the NuttX interfacing code needed hook pdcurses into the NuttX graphics drivers.  Also test cases are needed to verify the pdcurses integration.

apps/nshlib:  Big simplification of last change.  /proc/kmm, umm, and progmem have been replaced with a single procfs file called /proc/meminfo.  The NSH free command now degenerates to a simple dump of /proc/meminfo.

apps/nshlib:  The free commands no longer used mallinfo() to get the state of the use heap.  Two reasons:  That is not useful information in the kernel build.  And (2) there are other memory resources of interest in other configurations such as the Kernel heap in PROTECTED and KERNEL builds, and the prog mem uses when FLASH is used to hold modifiable data.  The free command has been extended to just dump the content of procfs entries and to include all of these other memory resources of the procfs entries are available.

netutils/ftpc:  Eliminate warnings about types of inputs to netlib_ipv4adaptr() and about ftp_cmd_pasv() being defined but not used.

FTP: Adds support for IPv6 and fixes various transfer issues

* netutils/ftpd: Fix support for IPv6 FTP server

* netutils/ftpc:Adds support for IPv6 sockets

* ftpc: Must convert port received by EPSV reply to network order

* ftpc: Data socket address for passive connection should be same as server address

* ftpc: Must skip human readable string in EPSV response before scanning for port

* ftpc: Don't send PASS command if USER command was sufficient. ie no password required

* ftpc: Generically handle permanent negative completion in shard ftpc_cmd logic

* ftpc: Minor addresssing fix

* ftpc: Tweak logic for overriding network debugging output

* FTP: Adds option for setting stack size of various threads in FTPD and FTPC

* netutils/ftpd: Fixes build error setting IPv4 address. sin_addr => sin_addr.s_addr

* netutils/ftpd: Protects against partial write returns by looping in that case

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

apps/examples/ltdc:  Remove apps/examples/ltdc.  It violates the portable POSIX interface by calling directly into OS code.

smps, powerled examples: fix floating point format in printf

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

examples: add SMPS driver example

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

i8sak: Channel setting is now saved locally, so when performing a startpan or assoc, the channel previously set is still used, even though the MAC layer gets reset.  Also fixes a few build issues

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

include/netutils/netlib.h:  In order to avoid pre-processing warnings, NETLIB_SOCK_FAMILY must always be assigned a value, even if there is no real meaning value for it.

Fixed the compilation of nsh_routecmds.c, broken after commit 6b9d23c6



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

apps/fsutils/mkfatfs:  When fsutils/mkfats was split off from the operating system, there were a few dangling things left.  Some references to functions in the OS (which are not available in the protected and kernel modes) and several types and function prototeypes that don't exist is apps/fsutils/mkfatfs.

Adds i8shark, a sniffer "adapter" that captures all 802.15.4 traffic, packages it into a Wireshark ZEP packet, and sends it to a host running Wireshark.

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

i8sak: Changes 'notif' to 'primitive' corresponding to the changes in the Kernel

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

Fixed misprint in cmd_wget

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

Fixed i2ctool write operation in `no restart` mode (flag `-n`).

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

It seems that I2C driver has changed a bit since i2ctool was written,
so now i2ctool sends repeated start even if `no restart` flag (-n)
was passed to it.

include/netutils/netlib.h:  Add definitions needed when only local Unix domain sockets are supported.

Fix parsing of empty strings when CONFIG_NSH_CMDPARMS is not defined.  Problem noted by Juha Niskanen.