On 8th of December, Robert Haas committed patch:
psql: Support multiple -c and -f options, and allow mixing them. To support this, we must reconcile some historical anomalies in the behavior of -c. In particular, as a backward-incompatibility, -c no longer implies --no-psqlrc. Pavel Stehule (code) and Catalin Iacob (documentation). Review by Michael Paquier and myself. Proposed behavior per Tom Lane.
Continue reading Waiting for 9.6 – psql: Support multiple -c and -f options, and allow mixing them.