improve: APatch detection; fix: Magisk detection and Magisk manager detection; fix: fd leak

This commit both improves the APatch detection, making it more stricter, and fixes Magisk detection, together with its manager detection, allowing it to successfully boot. Also fixes a fd leak which makes it better at a long run.

zygiskd/src/zygiskd.c

@@ -784,6 +784,8 @@ void zygiskd_start(char *restrict argv[]) {
       }
     }
 
+    if (action != RequestCompanionSocket) close(client_fd);
+
     continue;
   }