yang regular char \w not include underline char

[nowaits]

Hi olof:
Yang regular char \w not include underline char. The transform of \w from XSD regex to posix ERE in regexp_xsd2posix maybe wrong. \w was translate to [^[:punct:][:space:][:cntrl:]], but char _ was excluded.

\w should be [[:alnum:]|_] and \W should be [^[[:alnum:]|_]], here is the diff:

diff --git a/lib/src/clixon_regex.c b/lib/src/clixon_regex.c
index 0c47dabc..9e25d56b 100644
--- a/lib/src/clixon_regex.c
+++ b/lib/src/clixon_regex.c
@@ -181,10 +181,10 @@ regexp_xsd2posix(char  *xsd,
                break;
            case 'w': /* word */
                //cprintf(cb, "[0-9a-zA-Z_\\\\-]")
-               cprintf(cb, "[^[:punct:][:space:][:cntrl:]]"); 
+               cprintf(cb, "[[:alnum:]|_]"); 
                break;
            case 'W': /* inverse of \w */
-               cprintf(cb, "[[:punct:][:space:][:cntrl:]]"); 
+               cprintf(cb, "[^[[:alnum:]|_]]"); 
                break;
            default:
                cprintf(cb, "\\%c", x);

[nowaits]

Here is my pull request:
#358

[olofhagsand]

I pulled the PR, thanks!
Does this fix the issue? If sp, please verify and close this issue.