text: Title: Fresh install, Compiling mycodo_wrapper upgrade_commands warnings
  Body: ### Describe the problem/bug
  
  During a fresh install I receive a couple warnings. Doesn't seem to affect anything, but new users may worry.
  
  ### Versions:
  
   - Mycodo Version: 8.8.8
   - Raspberry Pi Version: pi-zero
   - Raspbian OS Version: Buster Lite
  
  ### Additional context
  
  Log snippet
  ```
  #### Compiling mycodo_wrapper
  /home/pi/Mycodo/mycodo/scripts/mycodo_wrapper.c: In function ‘upgrade_commands’:
  /home/pi/Mycodo/mycodo/scripts/mycodo_wrapper.c:17:5: warning: ‘strncat’ specified bound 255 equals destination size [-Wstringop-overflow=]
       strncat(full_cmd, "/upgrade_commands.sh ", sizeof(full_cmd));
       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  /home/pi/Mycodo/mycodo/scripts/mycodo_wrapper.c: In function ‘main’:
  /home/pi/Mycodo/mycodo/scripts/mycodo_wrapper.c:35:4: warning: ‘strncat’ specified bound 255 equals destination size [-Wstringop-overflow=]
      strncat(restoreScript, "/upgrade_commands.sh backup-create", sizeof(restoreScript));
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  ```
  Full install.log https://termbin.com/8o5f6