Add braindead node "localization" method to return stuff like roots

pub key, root password, etc. Currently just returning the pub key,
which I stuck into a site variable. I need this for inner elab so that
the standard image can be used; root ssh from inner boss will fail
unless the pub key is changed, and we certainly do not want to have to
create special images for inner elab nodes, unless we want to of
course.

tmcd/tmcd.c

@@ -229,6 +229,7 @@ COMMAND_PROTOTYPE(dotmcctest);
 COMMAND_PROTOTYPE(dofwinfo);
 COMMAND_PROTOTYPE(dohostinfo);
 COMMAND_PROTOTYPE(doemulabconfig);
+COMMAND_PROTOTYPE(dolocalize);
 
 /*
  * The fullconfig slot determines what routines get called when pushing
@@ -305,6 +306,7 @@ struct command {
         { "firewallinfo", FULLCONFIG_ALL,  0, dofwinfo},
         { "hostinfo",     FULLCONFIG_NONE, 0, dohostinfo},
 	{ "emulabconfig", FULLCONFIG_NONE, F_ALLOCATED, doemulabconfig},
+	{ "localization", FULLCONFIG_PHYS, 0, dolocalize},
 };
 static int numcommands = sizeof(command_array)/sizeof(struct command);
 
@@ -5449,3 +5451,40 @@ COMMAND_PROTOTYPE(dotmcctest)
 		info("%s", buf);
 	return 0;
 }
+
+/*
+ * Return node localization. For example, boss root pub key, root password,
+ * stuff like that.
+ */
+COMMAND_PROTOTYPE(dolocalize)
+{
+	MYSQL_RES	*res;	
+	MYSQL_ROW	row;
+	char		buf[MYBUFSIZE];
+	char		*bufp = buf, *ebufp = &buf[sizeof(buf)];
+	int		nrows;
+
+	*bufp = (char) NULL;
+
+	/*
+	 * XXX sitevar fetching should be a library function
+	 */
+	res = mydb_query("select name,value "
+			 "from sitevariables where name='node/ssh_pubkey'",
+			 2);
+	if (!res || (nrows = (int)mysql_num_rows(res)) == 0) {
+		error("DOLOCALIZE: sitevar node/ssh_pubkey does not exist\n");
+		if (res)
+			mysql_free_result(res);
+		return 1;
+	}
+
+	row = mysql_fetch_row(res);
+	if (row[1]) {
+	    bufp += OUTPUT(bufp, ebufp - bufp, "ROOTPUBKEY='%s'\n", row[1]);
+	}
+	mysql_free_result(res);
+	client_writeback(sock, buf, strlen(buf), tcp);
+	return 0;
+}
+