https://bugs.gentoo.org/412941

fix matching in various locales

patch by Leho Kraav <leho@kraav.com>

--- a/src/lexer.l
+++ b/src/lexer.l
@@ -28,7 +28,7 @@
 bluemac                   { return BLUEMAC; }
 @                         { return AT;}
 ;                         { return SEMICOLON; }
-[a-zA-Z][a-zA-Z0-9_]*     { yylval.word  = (char *) strdup(yytext); return WORD; }
+[[:alpha:]][[:alnum:]_-]* { yylval.word  = (char *) strdup(yytext); return WORD; }
 {HXDIGD}{HXDIGD}{HXDIG}   { yylval.word  = (char *) strdup(yytext); return MAC; }
 [0-9][0-9]*               { yylval.value = atoi(yytext);   return DIGIT; }
 =                         { return EQUAL; }