Let the installer allow easy data-share with bbs.electronicchicken.com

Create a default server.ini pointing to localhost:10088 (same behavior as
if the file is absent) and allow the installer to modify it to point to
the Executive Chiggun's B.B.S. if the sysop opts-in.

xtrn/lemons/install-xtrn.ini

@@ -3,13 +3,19 @@ Desc: <MegaloYeti> someone needs to make a new lemmings game <echicken> claimed
 By:   echicken -at- bbs.electronicchicken.com
 Cats: Games
 Subs: Platfomer, Clone, JavaScript
-Inst: $Id: install-xtrn.ini,v 1.2 2020/04/17 08:13:20 rswindell Exp $
+Inst: 2020/09/11
 
 [prog:LEMONS]
 cmd  = ?lemons.js
 settings = XTRN_MULTIUSER
 required = true
 
+[ini:server.ini]
+prompt = Share data with electronic chicken bbs
+keys = host
+values = 'bbs.electronicchicken.com'
+done = true
+
 !include install-json-service.ini
 
 [ini:json-service.ini:lemons]

xtrn/lemons/server.ini

+host=localhost
+port=10088