Replaced VALID_HEX, ISODIGIT & NBSP macros in string.h #996

Job	Run time
cppcheck	16m 8s
Windows (x64, full)	8m 29s
macOS (with parser generation)	3m 42s
Windows (x64, wo curl)	8m 47s
Linux (x64, gcc, with parser generation)	1s
macOS (wo curl)	4m 12s
Windows (x64, wo lua)	7m 47s
Linux (x64, gcc, wo curl)	2m 27s
macOS (wo lua)	2m 57s
Windows (x64, wo maxmind)	8m 9s
Linux (x64, gcc, wo lua)	2m 34s
macOS (wo maxmind)	3m 17s
Windows (x64, wo libxml)	7m 49s
Linux (x64, gcc, wo maxmind)	2m 16s
Windows (x64, with lmdb)	7m 47s
macOS (wo libxml)	2m 51s
Linux (x64, gcc, wo libxml)	2m 34s
macOS (wo geoip)	3m 53s
Linux (x64, gcc, wo geoip)	1s
macOS (wo ssdeep)	3m 18s
Linux (x64, gcc, wo ssdeep)	1s
macOS (with lmdb)	5m 5s
Linux (x64, gcc, with lmdb)	1s
macOS (with pcre2)	4m 57s
Linux (x64, gcc, with pcre2)	1s
Linux (x64, clang, with parser generation)	1s
Linux (x64, clang, wo curl)	1s
Linux (x64, clang, wo lua)	1s
Linux (x64, clang, wo maxmind)	1s
Linux (x64, clang, wo libxml)	1s
Linux (x64, clang, wo geoip)	1s
Linux (x64, clang, wo ssdeep)	1s
Linux (x64, clang, with lmdb)	1s
Linux (x64, clang, with pcre2)	1s
Linux (x32, gcc, with parser generation)	2m 36s
Linux (x32, gcc, wo curl)	2m 37s
Linux (x32, gcc, wo lua)	2m 35s
Linux (x32, gcc, wo maxmind)	2m 36s
Linux (x32, gcc, wo libxml)	2m 35s
Linux (x32, gcc, with lmdb)	2m 37s
Linux (x32, gcc, with pcre2)	2m 35s
Linux (x32, clang, with parser generation)	2m 33s
Linux (x32, clang, wo curl)	2m 35s
Linux (x32, clang, wo lua)	2m 34s
Linux (x32, clang, wo maxmind)	2m 36s
Linux (x32, clang, wo libxml)	2m 37s
Linux (x32, clang, with lmdb)	2m 36s
Linux (x32, clang, with pcre2)	2m 36s
	2h 25m 31s

Provide feedback