fixes for build failures; copyrights; small bugfixes and comments


mysys/Makefile.am:
  missing .h breaks building from tarball
storage/maria/ma_loghandler.c:
  applying Serg's bugfix of trnman_new_trid() to translog_assign_id_to_share()
storage/maria/ma_loghandler.h:
  copyright
storage/maria/ma_loghandler_lsn.h:
  copyright
storage/maria/maria_read_log.c:
  fix for compiler warnings. Comments.
  Close tables when program ends.