replace https bool with flags bitmask in http_connection

Convert the `https` boolean field to a flags-based approach using
HTTP_CON_FLAG_HTTPS. This provides better extensibility for future
connection state flags while maintaining existing HTTPS functionality.

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

Author: zhaojh329

src/http.c

@@ -224,7 +224,7 @@ static void on_connected(int sock, void *arg)
 
     conn->sock = sock;
 
-    if (conn->https) {
+    if (conn->flags & HTTP_CON_FLAG_HTTPS) {
 #ifdef SSL_SUPPORT
         conn->ssl = ssl_session_new(rtty->ssl_ctx, sock);
         if (!conn->ssl) {
@@ -299,9 +299,11 @@ void http_request(struct rtty *rtty, int len)
 
     conn = (struct http_connection *)calloc(1, sizeof(struct http_connection));
     conn->rtty = rtty;
-    conn->https = https;
     conn->active = ev_now(rtty->loop);
 
+    if (https)
+        conn->flags |= HTTP_CON_FLAG_HTTPS;
+
     memcpy(conn->addr, addr, 18);
 
     data = buffer_put(&conn->wb, len);

src/http.h

@@ -27,6 +27,10 @@
 
 #include "rtty.h"
 
+enum {
+    HTTP_CON_FLAG_HTTPS = 1 << 0
+};
+
 struct http_connection {
     struct list_head head;
     struct rtty *rtty;
@@ -38,7 +42,7 @@ struct http_connection {
     ev_tstamp active;
     int sock;
     uint8_t addr[18];   /* upstream connection address: [port ip] */
-    bool https;
+    uint8_t flags;
 #ifdef SSL_SUPPORT
     bool ssl_negotiated;
     void *ssl;