recno cleanups

make recno eof flag part of each BT struct

make eof flag part of each BT struct; test for sb.st_size larger than
the maximum int; set bt_rfp to NULL if not set, used as a flag in close

increment necessary dsize by 1 so that we don't crash if the first
record retrieved is 0 length.

__bt_push index was off-by-one

make CURSOR of recno 0 do the right thing; copy the key out, too

make R_IAFTER of recno 0 work

decrement record count in rec_dleaf, where the delete is really done

close the underlying file descriptor

exact is meaningless for recno; make eof flag part of each BT struct

prefix all ANSI #define's with BSD_ so don't collide with other vendors

put Bentley's comment into the source code for info purposes

the seek function takes a fpos_t (off_t), not a long

second arg to mmap is a size_t

GCC2 changed the type of the shift count; make this work since we
still use both compilers. This should be ripped out as soon as possible.
From Chris Torek

add bigendian support

add bigendian support

add bigendian support

__qdivmod => __qdivrem

use inet_aton since it can distinguish 255.255.255.255

check for NULL environment (4.3BSD-reno/lib/2)

ANSI prototypes (two real bugs)

add support for luna68k from Omron

add support for luna68k from Omron

add support for luna68k from Omron