[23532] and [23533]:

Rename configure.in to configure.ac 
Bug 688579 - Run xmllint or variant in make distcheck 


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash-docs/branches/2.4@23537 57a11ea4-9604-0410-9ed3-97b8803252fd