This patch updates the copyright blurbs in libpthread repository to match upstream glibc requested format.
Specific changes are: * use YYYY-2018 for copyright dates * replace obsolete FSF address with current gnu.org URL reference from glibc. Joseph also asked in the other thread for "Contributed by" lines not to be added in new files. There are a few in this code, but the files creation are usually very old - late 1990's early 2000's - so I am not sure if they really qualify as "new". Should I remove or leave? AYJ
