Implement support for notification types

- add new flag "-t" for notification types to matrix-host-notification
  and matrix-service-notification
- implement value validation for HostState and ServiceState

internal/matrix/constants.go

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package matrix
 
 const (

internal/matrix/message.go

@@ -13,6 +13,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
 package matrix
 
 import (