Add overlap, adjacent operators for inet.
Move access macros and bitncmp function for inet to the header.
Add bitncommon function.
Add GiST support for inet.
Add tests for inet GiST.
Document overlap, adjacent operators for inet.
Remove adjacent operator for inet.
Change overlap example for inet.
Improve comments of the inet GiST functions.
Remove new line at of network_gist.c
Use memcmp on the inet_gist_same function.
Mention GiST for inet on the documentation.
Rename the result variable of the inet_gist_union function.
Add inet overlap selectivity functions.
Remove the network_adjacent_selectivity function.
Rename inet overlap selectivity functions.
Change OID for inetoverlapsel function.
Add description to inetoverlapsel function.
Fix compiler warnings on the inet_hist_overlap_selectivity function.
Remove new line at of network_selfuncs.c