i8sak: Adds ability to get/set rxonidle setting for MAC layer

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

i8shark: Adds CONFIG_IEEE802154_I8SHARK_XBEE_APPHDR option to remove XBee's application header before sending to Wireshark. This option will corrupt any traffic received that does not include this application header.

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

apps/graphics/pdcurs34:  Monochrome/greylevel framebuffer support is now code complete, but untested.  Also added support for Y2 and Y2 color formats.

apps/graphics/pdcurses:  Add support for discrete joystick input.  This is sufficient to get through all menuing tests that do not require text input.

apps/pdcurses/: Fix a few more bugs found in testing; apps/examples/pdcurses:  Brings in the remaining pdcurses demo programs.

    apps/graphics/pdcur34:  Various fixes from initial testing.  Still does not work

    apps/graphics/pdcurs34/nuttx:  Completes first cut at framebuffer rendering logic.

apps/graphics/pdcurs34:  Add NuttX framebuffer color managment and beginning of some rendering logic.

apps/examples/pdcurses:  Bring pdcurses demos and make them conform to the NuttX coding style (not yet hooked into the build system).

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>