tools/cnvwindeps.c:  Need to build this tool even on non-Cygwin platforms (either that or rethink the dependencies).

mkdeps.sh and mkdeps.bat have been deleted.  All configurations must now use the compiler mkeps program

Some networking logic was used helpers from apps/netutils.  Not good.  Quick fix is to duplicate logic

Some networking logic was used helpers from apps/netutils.  Not good.  Quick fix is to duplicate logic

tools/cnvwindeps.c: Add a tool that will convert dependencies created by a Windows native toolchain for use the Cygwin make

debug macros for AVR (take #2): Introduce arch-specific debug macro hooks

Make it possible for arch code to provide hook macros for NuttX dbg
that will lead to arch-specific syslog() and lowsyslog() variants.

This may be specific for Atmel AVR8 toolchain compiler.
The problem is that despite of being 8-bit architecture
avr-gcc supports uint64_t, but the following code

uint64_t value = 10000 * 1000;

produces a wrong negative value in the final code (tested
both with and without optimization).

The work-around is simple:

uint64_t value = 10000 * 1000L;

The code is a reduced part from sched/signal/sig_timedwait.c where
waitticks64 is calculated using NSEC_PER_TICK. This one is defined
as USEC_PER_TICK * NSEC_PER_USEC which leads to the example above.