Rename the Python 3 subpackage to python3-libxml2 as per guidelines

https://fedoraproject.org/wiki/Packaging:Python#Naming

libxml2.spec

@@ -3,7 +3,7 @@
 Summary: Library providing XML and HTML support
 Name: libxml2
 Version: 2.9.2
-Release: 5%{?dist}%{?extra_release}
+Release: 6%{?dist}%{?extra_release}
 License: MIT
 Group: Development/Libraries
 Source: ftp://xmlsoft.org/libxml2/libxml2-%{version}.tar.gz
@@ -60,12 +60,14 @@ Requires: libxml2 = %{version}-%{release}
 Static library for libxml2 provided for specific uses or shaving a few
 microseconds when parsing, do not link to them for generic purpose packages.
 
-%package python
+%package -n python-%{name}
 Summary: Python bindings for the libxml2 library
 Group: Development/Libraries
 Requires: libxml2 = %{version}-%{release}
+Obsoletes: %{name}-python < 2.9.2-6
+Provides: %{name}-python = %{version}-%{release}
 
-%description python
+%description -n python-%{name}
 The libxml2-python package contains a Python 2 module that permits applications
 written in the Python programming language, version 2, to use the interface
 supplied by the libxml2 library to manipulate XML files.
@@ -76,12 +78,14 @@ this includes parsing and validation even with complex DTDs, either
 at parse time or later once the document has been modified.
 
 %if 0%{?with_python3}
-%package python3
+%package -n python3-%{name}
 Summary: Python 3 bindings for the libxml2 library
 Group: Development/Libraries
 Requires: libxml2 = %{version}-%{release}
+Obsoletes: %{name}-python3 < 2.9.2-6
+Provides: %{name}-python3 = %{version}-%{release}
 
-%description python3
+%description -n python3-%{name}
 The libxml2-python3 package contains a Python 3 module that permits
 applications written in the Python programming language, version 3, to use the
 interface supplied by the libxml2 library to manipulate XML files.
@@ -176,7 +180,7 @@ rm -fr %{buildroot}
 
 %{_libdir}/*a
 
-%files python
+%files -n python-%{name}
 %defattr(-, root, root)
 
 %{_libdir}/python2*/site-packages/libxml2.py*
@@ -189,7 +193,7 @@ rm -fr %{buildroot}
 %doc doc/python.html
 
 %if 0%{?with_python3}
-%files python3
+%files -n python3-%{name}
 %defattr(-, root, root)
 
 %{_libdir}/python3*/site-packages/libxml2.py*
@@ -206,6 +210,9 @@ rm -fr %{buildroot}
 
 
 %changelog
+* Sat Aug 22 2015 Kalev Lember <klember@redhat.com> - 2.9.2-6
+- Rename the Python 3 subpackage to python3-libxml2 as per guidelines
+
 * Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 2.9.2-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild