Improve send_mail() because it acts more like the logger

* output failure events to stdout if verbose set, useful for those without a mailer
 * do not email if recipient var is undef; allows flexibility for non-releng use cases

Signed-off-by: Nic Boet <nic@boet.cc>
Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>

tools/catalyst-auto

@@ -53,8 +53,14 @@ EOH
 }
 
 send_email() {
+	if [[ ${verbose} -ge 1 ]]; then
+		echo "$1 $2 build log at $3"
+	fi
+
 	[[ ${nonetwork} == 0 ]] || return
 
+	[[ ! -z ${EMAIL_TO} ]] || return
+
 	local subject="${EMAIL_SUBJECT_PREPEND} $1"
 	local message=$2
 	local logfile=$3