libmysql/libmysql.c:
  szPipeName -> pipe_name
  fixed usage of strxnmov()
mysys/mf_tempfile.c:
  Fixed usage of strnxmov()
  Simple optimization
mysys/my_tempnam.c:
  Fixed usage of strnxmov()
  Simple optimization
sql/log.cc:
  simple optimization
sql/mini_client.cc:
  szPipeName -> pipe_name
  fixed usage of strxnmov()
sql/mysqld.cc:
  szPipeName -> pipe_name
  fixed usage of strxnmov()
  Fixed indentation