Resolver: fixed crashes in timeout handler. If one or more requests were waiting for a response, then after getting a CNAME response, the timeout event on the first request remained active, pointing to the wrong node with an empty rn->waiting list, and that could cause either null pointer dereference or use-after-free memory access if this timeout expired. If several requests were waiting for a response, and the first request terminated (e.g., due to client closing a connection), other requests were left without a timeout and could potentially wait indefinitely. This is fixed by introducing per-request independent timeouts. This change also reverts 954867a2f0a6 and 5004210e8c78.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


CFLAGS = -nologo -O2 -Ob1 -Oi -Gs $(LIBC) $(CPU_OPT) -D L_ENDIAN

!IF "$(SHA1_ASM)" == "YES"

sha1.lib:
	cd $(SHA1)
	cl -c $(CFLAGS) -D SHA1_ASM sha1dgst.c
	link -lib -out:sha1.lib sha1dgst.obj asm/s-win32.obj

!ELSE

sha1.lib:
	cd $(SHA1)
	cl -c $(CFLAGS) sha1dgst.c
	link -lib -out:sha1.lib sha1dgst.obj

!ENDIF