Add CESNET support for supporting CESNET communities

GLOSSARY.md

@@ -28,5 +28,8 @@ Set of keys for asymmetric cryptography, used for secure remote access
 ## MUNI Identity Management
 [idm@ics.muni.cz](mailto:idm@ics.muni.cz)
 
+## CESNET Support
+[helpdesk@cesnet.cz](mailto:helpdesk@cesnet.cz)
+
 ## VO
 Virtual Organization, unit of organizational hierarchy

register/README.md

@@ -54,7 +54,7 @@ of the requested group project. Membership is managed with tools provided by the
 identity federation, in a self-service manner.
 
 If you are already using services provided by the __CESNET e-Infrastructure__ e.g. MetaCentrum or Data Care,
-please contact user support in order to create a new group within the CESNET e-Infrastructure.  
+please contact CESNET support in order to create a new group within the CESNET e-Infrastructure.  
 If you represent a project internal to __Masaryk University__, please contact the MUNI Identity Management team
 in order to create a new group within the Unified MU Login service.