Refer to nexedi.org/static if egg version has slaposXXX

This covers Nexedi versions of e.g. zc.buildout and zc.recipe.egg.
Without the fix those eggs were reported as e.g.

    zc.buildout                  2.7.1+slapos019 https://pypi.org/project/zc.buildout/2.7.1+slapos019/

which was not correct.

nxdbom/__init__.py

@@ -65,8 +65,11 @@ def bom_software(installed_software_path): # -> {} (name,kind) -> PkgInfo
                 if m is not None:
                     v = m.group('ver')
                 # if ver comes with nxd -> use nexedi.org instead of pypi
-                if 'nxd' in v.lower():
-                    url = 'http://www.nexedi.org/static/packages/source/%s-%s.tar.gz' % (name, v)
+                if 'nxd' in v.lower()  or  'slapos' in v.lower():
+                    nxdbase = 'http://www.nexedi.org/static/packages/source'
+                    if name == 'zc.buildout':
+                        nxdbase += '/slapos.buildout'
+                    url = '%s/%s-%s.tar.gz' % (nxdbase, name, v)
                 else:
                     url = 'https://pypi.org/project/%s/%s/' % (name, v)
             else:

nxdbom/nxdbom_test.py

@@ -269,17 +269,23 @@ __buildout_installed__ = /ROOT/develop-eggs/astroid-1.3.8+slapospatched001-py2.7
 astroid                      1.3.8+slapospatched001 https://pypi.org/project/astroid/1.3.8/
 """)
 
-# nxd in egg version -> nexedi.org
+# nxd or slaposXXX in egg version -> nexedi.org
 case1("""\
 [testrunner]
 recipe = zc.recipe.egg
 _d = /ROOT/develop-eggs
 _e = /ROOT/eggs
 eggs = SOAPpy
+       zc.recipe.egg
+       zc.buildout
 -- /ROOT/eggs/SOAPpy-0.12.0nxd001-py2.7.egg/x --
+-- /ROOT/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/x --
+-- /ROOT/eggs/zc.recipe.egg-2.0.3+slapos003-py2.7.egg/x --
 """, """
 >>> eggs:
 SOAPpy                       0.12.0nxd001 http://www.nexedi.org/static/packages/source/SOAPpy-0.12.0nxd001.tar.gz
+zc.buildout                  2.7.1+slapos019 http://www.nexedi.org/static/packages/source/slapos.buildout/zc.buildout-2.7.1+slapos019.tar.gz
+zc.recipe.egg                2.0.3+slapos003 http://www.nexedi.org/static/packages/source/zc.recipe.egg-2.0.3+slapos003.tar.gz
 """)
 
 # %20 in URL