Add dutch quota notifications

server/conf/mail/db_quota_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Database quota notificatie
+
+De database {database_name} heeft (bijna) het opslaglimiet bereikt.
+
+Database:		{database_name}
+Used space:		{used}
+Quota:			{quota}
+Usage ratio:	{ratio}

server/conf/mail/db_quota_ok_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Database quota ok
+
+De database {database_name} heeft niet meer (bijna) het opslaglimiet bereikt.
+
+Database:		{database_name}
+Used space:		{used}
+Quota:			{quota}
+Usage ratio:	{ratio}

server/conf/mail/mail_quota_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Mailbox quota notification
+
+De mailbox {email} heeft (bijna) het opslaglimiet bereikt.
+
+Mailbox:			{email}
+Name:				{name}
+Used space:			{used}
+Quota:				{quota}
+Usage ratio:		{ratio}

server/conf/mail/mail_quota_ok_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Mailbox quota ok
+
+De mailbox {email} is niet meer (bijna) vol.
+
+Mailbox:			{email}
+Name:				{name}
+Used space:			{used}
+Quota:				{quota}
+Usage ratio:		{ratio}

server/conf/mail/web_quota_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Website quota notification
+
+De website {domain} heeft (bijna) het opslaglimiet bereikt.
+
+Domain: 		{domain}
+Used space:		{used}
+Soft limit:		{soft}
+Hard limit:		{hard}
+Usage ratio:	{ratio}

server/conf/mail/web_quota_ok_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Website quota ok
+
+De website {domain} is niet langer (bijna) buiten het opslaglimiet.
+
+Domain: 		{domain}
+Used space:		{used}
+Soft limit:		{soft}
+Hard limit:		{hard}
+Usage ratio:	{ratio}

server/conf/mail/web_traffic_notification_nl.txt

+MIME-Version: 1.0
+Content-type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+From: {admin_mail}
+Reply-To: {admin_mail}
+Subject: Webverkeerslimiet bereikt
+
+De website {domain} heeft het verkeerslimiet voor deze maand bereikt en is uitgeschakeld.