In psql's \df+, move function source code to the footers

When Who What
2016-11-08 21:32:23 Robert Haas (rhaas) Closed in commitfest 2016-11 with status: Rejected
2016-10-02 13:56:04 Michael Paquier (michael-kun) Closed in commitfest 2016-09 with status: Moved to next CF
2016-09-28 16:59:56 Robert Haas (rhaas) New status: Ready for Committer
2016-09-26 04:14:08 Rushabh Lathia (rlathia) Added rlathia as reviewer
2016-09-04 05:30:22 Pavel Stehule (okbobcz) New status: Waiting on Author
2016-08-22 07:30:52 Pavel Stehule (okbobcz) Added okbobcz as reviewer
2016-08-18 15:55:07 Tom Lane (tgl) Added annotation "this is the patch this CF entry is about, not the initial one in the thread" to 19480.1468429315@sss.pgh.pa.us
2016-08-18 15:53:38 Tom Lane (tgl) Changed authors to Tom Lane (tgl)
2016-08-18 15:53:20 Tom Lane (tgl) Attached mail thread CAB7nPqTR3Vu3xKOZOYqSm-+bSZV0kqgeGAXD6w5GLbkbfd5Q6w@mail.gmail.com
2016-08-18 15:53:20 Tom Lane (tgl) Created patch record