xundump: Support splitting any table

Each part of a split table needs to supply rows for the same objects.
We currently require each part to name its objects explicitly, with an
object ID field, and don't support splitting tables that don't have
such IDs.  These restrictions became arbitrary when commit 4e23c45
implemented checking each partial table supplies the same rows.  Relax
them.

Affects tables sect, news, lost, realm, game, infrastructure.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>

tests/empdump/errors.err

@@ -2,11 +2,8 @@ tests/empdump/xundump-errors/colhdr-amb:2: Header m of field 3 is ambiguous
 tests/empdump/xundump-errors/colhdr-dup:2: Duplicate header name in field 2
 tests/empdump/xundump-errors/colhdr-dup2:6: Duplicate header name in field 3
 tests/empdump/xundump-errors/colhdr-dup3:2: Duplicate header pkg(0) in field 8
-tests/empdump/xundump-errors/colhdr-ellipsis:2: Header field uid required in each table part
+tests/empdump/xundump-errors/colhdr-ellipsis:2: Header fields expected
 tests/empdump/xundump-errors/colhdr-ellipsis2:2: Junk after ...
-tests/empdump/xundump-errors/colhdr-ellipsis3:2: Table infrastructure doesn't support ...
-tests/empdump/xundump-errors/colhdr-ellipsis4:2: Header field uid required in each table part
-tests/empdump/xundump-errors/colhdr-ellipsis5:2: Table sect doesn't support ...
 tests/empdump/xundump-errors/colhdr-eof:2: Unexpected EOF
 tests/empdump/xundump-errors/colhdr-first:2: Header field uid must come first
 tests/empdump/xundump-errors/colhdr-idxbig:2: Header pkg(99) index out of bounds in field 7
@@ -22,7 +19,6 @@ tests/empdump/xundump-errors/colhdr-miss:2: Header field uid missing
 tests/empdump/xundump-errors/colhdr-miss:2: Header field ctype(2) missing
 tests/empdump/xundump-errors/colhdr-miss:2: Header fields camt(0) ... camt(2) missing
 tests/empdump/xundump-errors/colhdr-miss:2: Header field nllag missing
-tests/empdump/xundump-errors/colhdr-miss2:21: Header field uid required in each table part
 tests/empdump/xundump-errors/colhdr-miss2:21: Header fields ctype(0) ... ctype(2) missing
 tests/empdump/xundump-errors/colhdr-miss2:21: Header fields camt(0) ... camt(2) missing
 tests/empdump/xundump-errors/colhdr-miss2:21: Header field type missing
@@ -75,7 +71,7 @@ tests/empdump/xundump-errors/fld-nosymset:2: Field 1 doesn't take symbol sets
 tests/empdump/xundump-errors/fld-sep:2: Bad field separator after field 1
 tests/empdump/xundump-errors/fld-strbig:3: Field 19 takes at most 9 characters
 tests/empdump/xundump-errors/fld-unexpid:6: Table's first part doesn't have this row
-tests/empdump/xundump-errors/fld-unexpid1:7: Expected 2 in field 1, like in table's first part
+tests/empdump/xundump-errors/fld-unexpid1:7: Value for field 1 must be 2
 tests/empdump/xundump-errors/fld-unksym:2: Unknown level symbol `xxx' in field 11
 tests/empdump/xundump-errors/fld-unparen:2: Unmatched '(' in field 19
 tests/empdump/xundump-errors/ftr-fewrows:2: Expected 1024 more rows

tests/empdump/errors.status

@@ -69,9 +69,6 @@
 1
 1
 1
-1
-1
-1
 0
 1
 0

tests/empdump/xundump-errors/colhdr-ellipsis

@@ -1,3 +1,3 @@
 config product
 ...
-# Header field uid required in each table part
+# Header fields expected

tests/empdump/xundump-errors/colhdr-ellipsis3

@@ -1,3 +0,0 @@
-config infrastructure
-name ...
-# Table infrastructure doesn't support ...

tests/empdump/xundump-errors/colhdr-ellipsis4

@@ -1,3 +0,0 @@
-config product
-sname name ...
-# Header field uid required in each table part

tests/empdump/xundump-errors/colhdr-ellipsis5

@@ -1,4 +0,0 @@
-config sect
-xloc yloc ...
-# Table sect doesn't support ...
-/config

tests/empdump/xundump-errors/colhdr-miss2

@@ -19,7 +19,6 @@ uid sname ...
 
 config product
 name
-# Header field uid required in each table part
 # Header fields ctype(0) ... ctype(2) missing
 # Header fields camt(0) ... camt(2) missing
 # Header field type missing

tests/empdump/xundump-errors/fld-unexpid1

@@ -5,5 +5,5 @@ uid ...
 config ship
 uid ...
 1
-# Expected 2 in field 1, like in table's first part
+# Value for field 1 must be 2
 /config