emptycommit-12104
Copyright notice update: added 2018 with perl -pi -e 's/ (\d{4}-)?(2017)(?= Free Software)/ " ".($1||"$2-").($2+1)/e' **/*(^/) under zsh, reverting the ck-mparam and timings-mpfr.c files and the mbench directory under "tools" (not distributed with MPFR). Removed 2017 from the example in the doc/README.dev file.