(xundump): Set empfile member cids in addition to fids.
(xundump): Clarify shortcomings: requires EFF_MEM, appends sentinel
always, can't grow dynamic cache.
(xundump): Return table type on success.
Rename close_files() to ef_close_srv() and move to fileinit.c.
Replace calls to close_files() with ef_fin_srv().
Call ef_close_srv() from ef_fin_srv().
(ef_close_srv, ef_fin_srv): New.
(init_files, init_server, ef_init_srv):
Rename init_files() to ef_open_srv() and move to fileinit.c.
Remove call to init_files() from init_server() and replace
with a call to ef_open_srv() from ef_init_srv().
(ef_open_srv): New.
(ef_load, init_server, ef_init_srv):
Move the call to ef_load() from init_server() to ef_init_srv().
(global_init, init_server, ef_init_srv):
Move the call to global_init() from init_server() to ef_init_srv().
(nullify_objects, global_init, init_server):
Split nullify_objects() into init_lchr() and init_dchr().
Locate init_lchr() and init_dchr() in init.c.
Add calls to init_lchr() and to init_dchr() from global_init().
(init_lchr(), init_dchr()): New.
player->owner is no longer used. Use it to indicate that owner can be
accessed through struct genitem, similar to EFF_XY and EFF_GROUP.
(xdump): Fix ownership checking. Old version worked only when
nxtitem() set player->owner.
(empfile): Set EFF_OWNER for EF_LOST. This fixes `xdump lost'
disclosing other countries' losses.
(loststr): Document implications of EFF_OWNER.
(empfile): Set EFF_OWNER for EF_NATION.
(natstr): Rearrange members for EFF_OWNER, document.
(nat_ca): Unused so far. Clean it up, add most missing selectors.
(fileinit): Use it. This implements `xdump nation'.
(fileinit): Simplify setting map file size.
