Fix build with Swig 4

Two changes in python swig build options:
* Remove -classic (not supported anymore, was for python 2.2).
* Add -nofastunpack as default is set to fastunpack now/.

See also https://issues.apache.org/jira/browse/SVN-4818.
---
 build.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.conf b/build.conf
--- a/build.conf
+++ b/build.conf
@@ -101,7 +101,7 @@ test-scripts =
 
 bdb-test-scripts =
 
-swig-python-opts = $(SWIG_FEATURES) -python $(SWIG_PY_FEATURES) -classic
+swig-python-opts = $(SWIG_FEATURES) -python $(SWIG_PY_FEATURES) -nofastunpack
 swig-perl-opts = $(SWIG_FEATURES) -perl $(SWIG_PL_FEATURES) -nopm -noproxy
 swig-ruby-opts = $(SWIG_FEATURES) -ruby $(SWIG_RB_FEATURES)
 swig-languages = python perl ruby