Rebase to upstream release 10.15

Rebase to upstream release 10.14

Rebase to upstream release 10.13

update to 10.6 per release notes:
10-6.html

update to 10.5 per release notes:
10-5.html

time server on random port number

gcc is fixed (rhbz#1600395), dropping the workaround patch

sync with fedora rawhide

pltcl: drop tcl-pltcl dependency (rhbz#1571181)

fix upgrade subpackage (sync with F28+)

don't collide with libpq{,-devel}
sync with fedora rawhide

update to 10.3 per release notes:
10-3.html

build plpython3 subpackage

sync with Fedora 28 state
fix prevmajorversion to 9.2 (RHEL7 version)
reset Release to 1, for RHEL8 purposes