unix_socket_director{y,ies}

[ccharly]

According to this link.

unix_socket_directory has been renamed to unix_socket_directories in postgresql 9.3

Maybe some people are still using postgresql 9.2, so we should adapt the following command in Makefile.local from ..._directories to ..._directory when the user is using postgresql 9.2.

# for 9.3.x
echo unix_socket_directories = \'/tmp\' >> $(PSQL_DIR)/postgresql.conf

# for 9.2.x
echo unix_socket_directory = \'/tmp\' >> $(PSQL_DIR)/postgresql.conf

[ccharly]

This will be fixed if we apply this PR (see this commit).