Silently ignoring unexpected characters in configuration

Should also ignore `\r` as white space

src/configimpl.l

@@ -974,7 +974,7 @@ static void readIncludeFile(const char *incName)
 <SkipComment>\\[ \r\t]*\n		{ g_yyLineNr++; BEGIN(Start); }
 <SkipComment,SkipInvalid>.
 <*>\\[ \r\t]*\n				{ g_yyLineNr++; }
-<*>[ \t]
+<*>[ \t\r]
 <*>.                                    { config_warn("ignoring unknown character '%c' at line %d, file %s\n",yytext[0],g_yyLineNr,g_yyFileName.data()); }
 <*>\n					{ g_yyLineNr++ ; }