serre SVN

Include hostname in a couple more places

Document the production build

A Makefile for production builds (put some symlinks pointing to the upper level in the directory).
Example :

% ls -l production
drwxrwxr-x 54 danny backx 4096 May 25 09:23 build
lrwxrwxrwx 1 danny backx 17 May 23 03:04 CMakeLists.txt -> ../CMakeLists.txt
lrwxrwxrwx 1 danny backx 13 May 23 03:04 components -> ../components
lrwxrwxrwx 1 danny backx 7 May 23 03:04 main -> ../main
-rw-rw-r-- 1 danny backx 297 May 25 09:17 Makefile
lrwxrwxrwx 1 danny backx 23 May 23 03:04 sdkconfig -> ../sdkconfig.production
lrwxrwxrwx 1 danny backx 21 May 23 03:10 sdkconfig.defaults -> ../sdkconfig.defaults

Also separate rules for test and production builds, esp. timing restrictions for sunrise queries.

Don't capitalize member function

Get back to our original schedule (changed a week ago).
Rate limits on the sunrise/sunset handling.

Make the date format less ambiguous

Fix a bug with sunrise hour update : the condition could never be true, so we never actually updated.

Detect event of permanent failure to fetch sunrise (e.g. due to certificate mismatch).

Move stuff around at startup so GPIO settings preceed getting network and time.
More consistent status report (times together, visually more understandable source).

Move GPIO configuration, and set to 0, to before time query.