Support SCO OpenServer.
Support SCO OpenServer.

Patch by: Kean Johnston <jkj@sco.com>

* configure.in: Add check for -lsocket needed by BDB.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion