Subversion libraries don't get properly versioned so the library
names are always "libsvn_foo-1.so.0.0.0". Provide proper 
versioning information to libtool *without* changing the soname
for compatibility with upstream, so on-disk filenames are
unique across different releases.

--- subversion-1.14.2/configure.ac.soversion
+++ subversion-1.14.2/configure.ac
@@ -112,7 +112,12 @@
   SVN_APR_MAJOR_VERSION=1
 fi
 AC_SUBST(SVN_APR_MAJOR_VERSION)
-SVN_LT_SOVERSION="-version-info $svn_lib_ver"
+
+m4_define([svn_ver_minor], m4_bpatsubst(AC_PACKAGE_VERSION, [[0-9]*\.\([0-9]*\)\.[0-9]*], [\1]))
+m4_define([svn_ver_patch], m4_bpatsubst(AC_PACKAGE_VERSION, [[0-9]*\.[0-9]*\.\([0-9]*\)], [\1]))
+svn_ver_current="`expr $svn_lib_ver + svn_ver_minor`"
+
+SVN_LT_SOVERSION="-version-info $svn_ver_current:svn_ver_patch:svn_ver_minor"
 AC_SUBST(SVN_LT_SOVERSION)
 AC_DEFINE_UNQUOTED(SVN_SOVERSION, $svn_lib_ver,
                    [Subversion library major verson])