* support/cpp2/sdcc.h: HAVE_DOS_BASED_FILE_SYSTEM defined for _WIN23

* support/cpp2/sdcc.h: HAVE_DOS_BASED_FILE_SYSTEM defined for _WIN23
* src/SDCC.lex: cloneXxx and copyAndFreeXxx functions for options and optimize stack handling
* src/SDCCglobl.h, src/SDCCmain.c, src/ds390/main.c, src/mcs51/main.c, src/z80/main.c:
fixed width array of pointers replaced with sets;
multiple include and lib paths ared transferred to preprocessor and linker
* src/SDCCset.c, src/SDCCset.h: added function setFromSetNonRev() and mergeSets()
* src/SDCCsymt.c: reimplemented function inCalleeSaveList() by using sets instead
fixed width array of pointers
* src/SDCCutil.c, src/SDCCutil.h: added functions fputStrSet(), appendStrSet(), joinStrSet();
removed functions addToList(), join(), joinn(), pathCharsEquivalent(), pathCharTransform(),
fixupPath(), getPathDifference()
* src/ds390/gen.c, src/mcs51/gen.c: reimplemented function  inExcludeList() by using sets instead
fixed width array of pointers

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@2700 4a8a32a2-be11-0410-ad9d-d568d2c75423