"Merge Monty's fixes from main into release branch" .. cset):
- mysql_get_server_name() is a new client API function and so should
  be exported from libmysql[d].

libmysql/libmysql.def:
  mysql_get_server_name() is a new client API function and so should
  be exported from libmysql[d].
libmysqld/libmysqld.def:
  mysql_get_server_name() is a new client API function and so should
  be exported from libmysql[d].