Rename configure.in to configure.ac.
auto tools complain now about configure.in
name and configure.ac is preferred since many
years.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1572031 13f79535-47bb-0310-9956-ffa450edef68
Fix another auto tools warning by switching to
the recommened macro use for auto tools initialization.
I couldn't make the variable sytnax work though
but since they were only used on the following line,
using verbatim values should be OK.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1572035 13f79535-47bb-0310-9956-ffa450edef68
Update config.{guess,sub} from
http://git.savannah.gnu.org/gitweb/?p=config.git.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1572038 13f79535-47bb-0310-9956-ffa450edef68