Allow kernel config files to include files other than those in the CWD,

using unquoted paths.

usr.sbin/config/config.y

@@ -31,6 +31,7 @@
 %type	<str>	Save_id
 %type	<str>	Opt_value
 %type	<str>	Dev
+%token	<str>	PATH
 
 %{
 
@@ -128,6 +129,11 @@ Spec:
 		|
 	Config_spec SEMICOLON
 		|
+	INCLUDE PATH SEMICOLON {
+		if (incignore == 0)
+			include($2, 0);
+		};
+		|
 	INCLUDE ID SEMICOLON {
 	          if (incignore == 0)
 		  	include($2, 0);

usr.sbin/config/lang.l

@@ -96,6 +96,7 @@ int yyerror(const char *);
 
 %}
 ID	[A-Za-z_][-A-Za-z_0-9]*
+PATH	[./][-/.%^A-Za-z_0-9]+
 %START TOEOL
 %%
 {ID}		{
@@ -165,6 +166,11 @@ ID	[A-Za-z_][-A-Za-z_0-9]*
 				return tok;
 			/* otherwise continue scanning */
 		}
+{PATH}		{
+			BEGIN 0;
+			yylval.str = strdup(yytext);
+			return PATH;
+		}
 .		{	return yytext[0];		}
 
 %%