merge r2889, r2918, and r2921: fix a pool growing and CPU usage for multi-requests keepalive connections: *) keepalive_requests *) try to reuse last 4 free large allocation links *) do not test a pool block space if we can not allocated from the block 4 times

# Copyright (C) Igor Sysoev


CFLAGS = -zq -bt=nt -bm -ot -op -oi -oe -s $(CPU_OPT)

md5.lib:
	cd $(MD5)
	wcl386 -c $(CFLAGS) -dL_ENDIAN md5_dgst.c
	wlib -n md5.lib md5_dgst.obj