server : fix the log message when using SSL (#23393)

When llama-server is started with SSL key and cert, the log says that it
listens on http instead of https. This patch fixes this.

tools/server/server-http.cpp

@@ -99,6 +99,7 @@ bool server_http_context::init(const common_params & params) {
         srv.reset(
             new httplib::SSLServer(params.ssl_file_cert.c_str(), params.ssl_file_key.c_str())
         );
+        is_ssl = true;
     } else {
         SRV_INF("%s", "running without SSL\n");
         srv.reset(new httplib::Server());
@@ -379,7 +380,7 @@ bool server_http_context::start() {
     srv->wait_until_ready();
 
     listening_address = is_sock ? string_format("unix://%s", hostname.c_str())
-                                : string_format("http://%s:%d", hostname.c_str(), port);
+                                : string_format("%s://%s:%d", is_ssl ? "https" : "http", hostname.c_str(), port);
     return true;
 }
 

tools/server/server-http.h

@@ -74,6 +74,7 @@ struct server_http_context {
     std::string path_prefix;
     std::string hostname;
     int port;
+    bool is_ssl = false;
 
     server_http_context();
     ~server_http_context();