Refactor and "clean" some source files

added 20 commits

• 0660660e - 1 commit from branch master
• 8646689a - First pass splitting log.c
• bb8f7623 - Continue to split log, and correct inindentation and clean
• 707e92c1 - Finish to indent log.c
• 4efa2d70 - Fix typos
• 0fecaea8 - Start adding headers, clean typos and solve compilation issues
• 175d1c86 - Fix extern variables in headers
• f88bc38b - Fix compilation issues but not the proper way
• d194c238 - Replace my_strdup by libc strdup
• 298c33f4 - Fix braces warning
• c94c246d - Change standard of log to gnu11
• e9044f63 - Remove overflow warnings
• c95ab180 - Clean gate.c
• 26d6ae8e - Clean warnings in label.c
• 3ce72147 - Clean node
• 47c9adc0 - clean utils.c
• 0a391acf - Use heap instead of stack with strings
• bb0ec71b - Add eclipse compat
• a216a025 - Fix Makefile with space in workdir
• 0d1d5509 - Fix malloc invocations in 7166f285

Compare with previous version

enabled an automatic merge when the pipeline for 0d1d5509 succeeds

merged