bpo-34035: Fix several AttributeError in zipfile seek() methods. (GH-8527)

(cherry picked from commit 3f8c6913b82ed9c05e57175bcbfeacde46c598e3)

Co-authored-by: Mickaƫl Schoentgen <contact@tiger-222.fr>
diff --git a/Misc/ACKS b/Misc/ACKS
index c564c04..bcf5604 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1429,6 +1429,7 @@
 Peter Schneider-Kamp
 Arvin Schnell
 Nofar Schnider
+Mickaël Schoentgen
 Ed Schouten
 Scott Schram
 Robin Schreiber
diff --git a/Misc/NEWS.d/next/Library/2018-07-28-15-00-31.bpo-34035.75nW0H.rst b/Misc/NEWS.d/next/Library/2018-07-28-15-00-31.bpo-34035.75nW0H.rst
new file mode 100644
index 0000000..b66d281
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-07-28-15-00-31.bpo-34035.75nW0H.rst
@@ -0,0 +1 @@
+Fix several AttributeError in zipfile seek() methods. Patch by Mickaël Schoentgen.