'RELENG_5_3_0_RELEASE'.

This commit was manufactured to restore the state of the 5.3-RELEASE image.

lib/Makefile:
----------------------------
revision 1.1
date: 2004/08/19 23:41:12;  author: davidxu;  state: Exp;
Add AMD64 support code.
=============================================================================

RCS file: /home/ncvs/src/lib/libthr/arch/i386/i386/_setcurthread.c,v
----------------------------
revision 1.15
date: 2004/08/19 23:49:04;  author: davidxu;  state: Exp;  lines: +10 -3
Adjust code to support AMD64, on AMD64, thread needs to set fsbase by
itself before it can execute any other code, so new thread should be
created with all signals are masked until after fsbase is set.
=============================================================================

RCS file: /home/ncvs/src/lib/Makefile,v
----------------------------
revision 1.190
date: 2004/08/19 23:51:42;  author: davidxu;  state: Exp;  lines: +1 -2
build libthr on amd64.
=============================================================================

Approved by: re/scottl

Approved by:	re

Porting libthread_db to arm and/or powerpc is easy enough, but
we don't build gdb on those platforms yet.

Reviewed by:	imp, ru

Main ones: mostly use conditional expressions in ifdefs instead of a
mixture of conditional expressions and nested ifdefs.
Nearby ones:
- don't do less than echo the code in the comment about libc_r
- fixed some internal insertion sort errors and indentation errors.