Update to 2.5.1 release

NEWS

+Knot DNS 2.5.1 (2017-06-07)
+===========================
+
+Bugfixes:
+---------
+ - pykeymgr no longer crash on empty json files in the KASP DB directory
+ - pykeymgr no longer imports keys in the "removed" state
+ - Imported keys in the "removed" state no longer makes knotd to crash
+ - Including an empty configuration directory no longer makes knotd to crash
+ - pykeymgr is distributed and installed to the distribution tarball
+
 Knot DNS 2.5.0 (2017-06-05)
 ===========================
 

configure.ac

@@ -4,7 +4,7 @@ AC_PREREQ([2.60])
 
 m4_define([knot_VERSION_MAJOR],2)dnl
 m4_define([knot_VERSION_MINOR],5)dnl
-m4_define([knot_VERSION_PATCH],0)dnl
+m4_define([knot_VERSION_PATCH],1)dnl
 m4_define([knot_VERSION_EXTRA],)dnl
 m4_define([knot_PKG_VERSION],[knot_VERSION_MAJOR.knot_VERSION_MINOR.knot_VERSION_PATCH]knot_VERSION_EXTRA)dnl