Motivation / Problem

If client id is divisible by 16 he gets stuck with "server is restarting message" when the server restarts and never attempts to reconnect.

Steps to reproduce

0. Start the server.
1. Connect the client so his id is divisible by 16 (refreshing server a bunch of times helps to get it faster).
2. Type newgame in server console.
3. Client gets the server restarting message but never reconnects

Description

Add +1 to _network_reconnect as value 0 means no reconnect.

Checklist for review

Some things are not automated, and forgotten often. This list is a reminder for the reviewers.

• The bug fix is important enough to be backported? (label: 'backport requested')
• This PR touches english.txt or translations? Check the guidelines
• This PR affects the save game format? (label 'savegame upgrade')
• This PR affects the GS/AI API? (label 'needs review: Script API')
  • ai_changelog.hpp, gs_changelog.hpp need updating.
  • The compatibility wrappers (compat_*.nut) need updating.
• This PR affects the NewGRF API? (label 'needs review: NewGRF')
  • newgrf_debug_data.h may need updating.
  • PR must be added to API tracker