Files
nethack/sys/unix
nhmall 6c0ae092c6 distinguish global variables that get written to savefile
The g? structs had a mix of variables that were written to
the savefile, and those that were not.

For better clarity and to distinguish those that end up in
the savefile, relocate some g? variables that get written
directly to the savefile into different structs.

This updates EDITLEVEL, although technically it probably
didn't need to, since savefile contents are not changing.

Details:

    gb.bases            -> svb.bases
    gb.bbubbles         -> svb.bbubbles
    gb.branches         -> svb.branches
    gc.context          -> svc.context
    gd.disco            -> svd.disco
    gd.dndest           -> svd.dndest
    gd.doors            -> svd.doors
    gd.doors_alloc      -> svd.doors_alloc
    gd.dungeon_topology -> svd.dungeon_topology
    gd.dungeons         -> svd.dungeons
    ge.exclusion_zones  -> sve.exclusion_zones
    gh.hackpid          -> svh.hackpid
    gi.inv_pos          -> svi.inv_pos
    gk.killer           -> svk.killer
    gl.lastseentyp      -> svl.lastseentyp
    gl.level            -> svl.level
    gl.level_info       -> svl.level_info
    gm.mapseenchn       -> svm.mapseenchn
    gm.moves            -> svm.moves
    gm.mvitals          -> svm.mvitals
    gn.n_dgns           -> svn.n_dgns
    gn.n_regions        -> svn.n_regions
    gn.nroom            -> svn.nroom
    go.oracle_cnt       -> svo.oracle_cnt
    gp.pl_character     -> svp.pl_character
    gp.pl_fruit         -> svp.pl_fruit
    gp.plname           -> svp.plname
    gp.program_state    -> svp.program_state
    gq.quest_status     -> svq.quest_status
    gr.rooms            -> svr.rooms
    gs.sp_levchn        -> svs.sp_levchn
    gs.spl_book         -> svs.spl_book
    gt.timer_id         -> svt.timer_id
    gt.tune             -> svt.tune
    gu.updest           -> svu.updest
    gx.xmax             -> svx.xmax
    gx.xmin             -> svx.xmin
    gy.ymax             -> svy.ymax
    gy.ymin             -> svy.ymin

Related note:
There are some pointer variables that are heads of chains that were not
moved from 'g?' to 'sv?', because they are not actually written to the
savefile directly, but the objects/monst/trap/lightsource/timer in the
chains they point to are. That can be changed, if desired.
Examples: gi.invent, gm.migrating_objs, gb.billobjs, gm.migrating_mons,
          gf.ftrap, gl.light_base, gt.timer_base
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..
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This README provides the instructions for building the unofficial Mac
binaries using the Apple provided developer IDE named XCode.

Establish a developer team in XCode
===================================

Your first step should be to establish a developer team within XCode.
Launch XCode and open the preferences dialog (XCode Menu->Preferences).
Select the "Accounts" tab.  Add an account (usually this should just be
your apple ID account you used to setup the Mac).  After adding the account,
select the account and then add a team (usually this will be just a
personal team for Mac Development).

Obtain your developer team identifier
=====================================

Your DEVELOPMENT_TEAM can be found by opening Keychain Access
(found by Finder->Applications->Utilities).  Click on "My Certificates".
Look for your "Mac Developer" certificate.  Right click on
the certificate to open a dialog that shows certificate details.
Look for "Organizational Unit" among the details.  This ten digit value
is your development team identifier.

Create XCodeLocal.xcconfig file
===============================

Now you need to create the XCodeLocal.xcconfig file that will be used by
XCode to get your development team identifier.  Create the file in
sys/unix and add a single line such as:
DEVELOPMENT_TEAM = XXXXXXXXXX

Where XXXXXXXXXX is replaced with your development team identifier.

Open the project and build
==========================

In XCode open the project file sys/unix/NetHack.xcodeproj, select
the product NetHack and build.  The build results are placed in
~/nethackdir.