Fix infinite loop with circular includes (cppcheck-opensource#497)

Fix cppcheck-opensource#471 (preserve line splicing information in '/…

…/ ..' comments) (cppcheck-opensource#472)

fix cppcheck-opensource#337 - line splicing in comment not handled pr…

…operly (cppcheck-opensource#431)

fix cppcheck-opensource#459: Set __STRICT_ANSI__=1 for non-gnu standa…

…rds (cppcheck-opensource#460)

fix cppcheck-opensource#459: Set __STRICT_ANSI__=1 for non-gnu standa…

…rds (cppcheck-opensource#460)

Fix cppcheck-opensource#454: Accept __has_include for GNU C standards (…

…cppcheck-opensource#456)

Fix cppcheck-opensource#446 (change the rules of relativeness preserv…

…ing to depend on the source file including it for relative path includes) (cppcheck-opensource#445)

fix: parent relative paths, and rework on the whole path extraction m…

…echanics (cppcheck-opensource#429)

Preserve relativeness of included paths (w.r.t. current directory) (c…

…ppcheck-opensource#428)

Co-authored-by: Tal Hadad <[email protected]>

Fix relative paths, again (cppcheck-opensource#418)

Co-authored-by: Tal Hadad <[email protected]>