lower even further autoconf version, fix build on sl

aeb74cce · Miroslav Shaltev · b75cdb28 · aeb74cce
Commit aeb74cce authored Jun 26, 2014 by Miroslav Shaltev
--- a/configure.ac
+++ b/configure.ac
 AC_INIT(nomad, 3.6.1, miroslav.shaltev@shaltev.de)
-AC_PREREQ([2.67])
+AC_PREREQ([2.63])
 AC_CONFIG_HEADERS([config.h])

 # Checks for programs.