Ieee802154

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

photon/wlan: disable network logs and add nsh over telnet

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

TCP: Fix some potential error conditions that could result from deferring the connection until the full 3-way handshake has completed.

Syslog interrrupt buffer:  eliminate a warning about an uninitialized variable; simply some related logic.

libc/wchar: Versions mbrlen and mbsrtowcs taken and adapted from FreeBSD code (at https://github.com/freebsd/freebsd/)

libc/wchar: Versions mbrlen and mbsrtowcs taken and adapted from FreeBSD code (at https://github.com/freebsd/freebsd/)

Kconfig/deconfigs:  Add CONFIG_ARCH_TOOLCHAIN_GNU to indicate that the toolchain is based on GNU gcc/as/ld.  This is in addition to the CPU-specific versions of the same definition.

STM32F410.  Add support for STM32Fr10.  STM32F410 is a version of STM32F4 with 32 KB of RAM and 62 or 128 KB of flash.

kinetis:K66 GPIO and pin mux cleanup

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

Fix the libcanard link version to get it compiling without errors.

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

Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com>

Bitbucket Issue 47: Some of last syslog changes needed to be condition on #ifdef CONFIG_SYSLOG_BUFFER in order to be built without syslog buffering enabled.

STM32L4: port stm32l4_serial_get_uart function from STM32F7

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

syslog:  There is yet another place where the output can get split.  That is in syslog_dev_write():  It will break up the stream to insert a CR before the LF.  This can that can be avoid be generating the CR-LF sequence in the buffer and then detecting and ignoring valid CR-LF sequences, rather than expecting syslog_dev_write() to insert the CR in this case.

I don't like the idea that syslog_dev_write() still scans the entire output buffer to expand CR-LF sequence.  This seems really wasteful, especially in this case where we can be sure that the is no CR or LF without a matching LF or CR.  Bu, I think, the existing behavior in syslog_dev_write() must be retained because it is needed in other contexts.