Update to 8.2.7
Remove HIER patch option, since it is not available anymore. The site
is down and original author responses that he does not maintain it
Remove option to build and link with thread safety, and always build
thread safe instead. Decided after a discussion with postgresql
hackers, and tested for a while in postgresql83. This helps when
for example linking with openldap, or for using certain programming
languages as postgresql functions.