None of the other release pages have a "v" before the version number.

Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 5a7ac058)

(cherry picked from commit 4bfcd6ae)

Resolves #1937

(cherry picked from commit 1566324f)

(cherry picked from commit f1f188f8)

respondd address

(cherry picked from commit c612dfba)

(cherry picked from commit 1e66cd90)

Uncovered by sphinx-build:
docs/releases/v2018.2.1.rst:19: WARNING: Too many autonumbered footnote references: only 0 corresponding footnotes available.
docs/releases/v2018.2.1.rst:19: WARNING: Unknown target name: "noibss".
docs/releases/v2018.2.1.rst:26: WARNING: Unknown target name: "noibss".
docs/releases/v2018.2.1.rst:30: WARNING: Unknown target name: "noibss".
docs/releases/v2018.2.1.rst:34: WARNING: Unknown target name: "noibss".
docs/releases/v2018.2.1.rst:35: WARNING: Unknown target name: "noibss".

fixes #1561

Fixes: #1463