t9001: use older Getopt::Long boolean prefix '--no' rather than '--no-'

The '--no-chain-reply-to' option is a Getopt::Long boolean option. The
'--no-' prefix (as in --no-chain-reply-to) for boolean options is not
supported in Getopt::Long version 2.32 which was released with Perl 5.8.0.
This version only supports '--no' as in '--nochain-reply-to'.  More recent
versions of Getopt::Long, such as version 2.34, support either prefix. So
use the older form in the tests.
Signed-off-by: NBrandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

t/t9001-send-email.sh

@@ -827,7 +827,7 @@ test_expect_success 'no warning with an explicit --no-chain-reply-to' '
 	--dry-run \
 	--from="Example <nobody@example.com>" \
 	--to=nobody@example.com \
-	--no-chain-reply-to \
+	--nochain-reply-to \
 	outdir/000?-*.patch 2>errors >out &&
 	! grep "no-chain-reply-to" errors
 '