feat: implement montauk::service_log & add support to system services

programs/src/ntp/main.cpp

@@ -6,8 +6,10 @@
 
 #include <montauk/config.h>
 #include <montauk/ntp.h>
+#include <montauk/service_log.h>
 #include <montauk/string.h>
 #include <montauk/syscall.h>
+#include <libc/stdio.h>
 
 static constexpr uint64_t RETRY_INTERVAL_MS =
     montauk::ntp::MIN_QUERY_INTERVAL_MS;
@@ -15,9 +17,9 @@ static constexpr uint64_t SYNC_INTERVAL_MS = 60ULL * 60ULL * 1000ULL;
 static constexpr uint64_t CONFIG_POLL_MS = 5000;
 
 static void log(const char* message) {
-    montauk::print("ntp: ");
-    montauk::print(message);
-    montauk::print("\n");
+    char line[256];
+    snprintf(line, sizeof(line), "ntp: %s", message);
+    montauk::service_log(line);
 }
 
 static bool load_settings(char* server, int server_cap) {