based on OSPF Neighbor State Check by Thomas Wollner

changes by thl-cmk[at]outlook[dot]com]
2018-06-15: changed item from neighbor id to neighbor address
added events as perfdata (incl. metrics file)
moved part of the output to long output
2020-07-26: added parse section, alias, wato for alias and state
2021-09-15: rewritten for CMK 2.0