Travis CI: Remove unused configure flag

The --disable-http flag no longer exists.
Merge pull request #297 from weiss/remove-configure-flag

Travis CI: Remove unused configure flag
Support XEP-0352: Client State Indication
Add tests for Client State Indication support
Merge pull request #298 from weiss/csi

Add support for XEP-0352: Client State Indication (CSI)
Avoid generation of excessive records
added p1_utils to reltool.config resolving treap:empty() undefined error
Merge pull request #299 from sjmackenzie/processone

added p1_utils to reltool.config resolving treap:empty() undefined error