files for regular expression in gawk.texi

[Hirofumi Saito]

Hello.

In the section 'C.2.2 Porting gawk to a New Operating System' of gawk.texi,
there is a sentence below.

> Thus, you should not change them
> unless it is for a very good reason; i.e., changes are not out of the
> question, but changes to these files are scrutinized extra carefully.
> The files are @file{getopt.h}, @file{getopt.c},
> @file{getopt1.c}, @file{regex.h}, @file{regex.c}, @file{dfa.h},
> @file{dfa.c}, @file{install-sh}, and @file{mkinstalldirs}.

But, regcomp.c, regex_internal.c, regex_internal.h and regexec.c are also 
the external files which we have to scrutinize extra carefully.
Because these files are common files for regular expression which are
used for not only gawk also other tools.

So, is it necessary to include these file names in this sentence?

Regards,

Hirofumi.