Set of changes so that "obtrusive" syntactic elements in a C/C++/ObjC

Set of changes so that "obtrusive" syntactic elements in a C/C++/ObjC
preprocessor line (e.g. an unbalanced string quote or unmatched paren)
don't interact syntactically with stuff outside the CPP line.
(c-awk-beyond-logical-line, c-awk-old-ByLL): Replace
c-awk-end-of-logical-line and c-awk-old-EoLL to solve an off-by-one bug.
(c-awk-record-region-clear-NL): Replaces c-awk-before-change, with a bit
of refactoring.
(c-awk-extend-and-syntax-tablify-region): Takes some of the functionality
of c-awk-advise-fl-for-awk-region, which has been refactored away.