ZODB, ZEO and tempstorage are also synthetic sections

Ignore them instead of complaining.

nxdbom/__init__.py

@@ -87,9 +87,11 @@ def bom_software(installed_software_path): # -> {} name -> PkgInfo
             # not to miss a normal part.
             url = part.get('url', None)
             if url is None:
-                if s == 'gcc':      # [gcc] is generic section to either use system gcc, or install one via slapos
-                    continue        # the one installed via slapos will come in its own section
-                if s == 'python':   # [python] is similar - it picks up either python2 or python3
+                # [gcc] is generic section to either use system gcc, or install one via slapos
+                # the one installed via slapos will come in its own section
+                # [python] is similar - it picks up  python2 or python3
+                # ZODB, ZEO, ... are similar as well
+                if s in ('gcc', 'python', 'ZODB', 'ZEO', 'tempstorage'):
                     continue
 
                 raise NotImplementedError('%s uses %s without url' % (s, recipe))

nxdbom/nxdbom_test.py

@@ -63,7 +63,7 @@ url = http://ftp.gnu.org/gnu/ncurses/ncurses-6.2.tar.gz
 ncurses                      6.2        http://ftp.gnu.org/gnu/ncurses/ncurses-6.2.tar.gz
 """)
 
-for x in ('gcc', 'python'):
+for x in ('gcc', 'python', 'ZODB', 'ZEO', 'tempstorage'):
     case1("""\
 [%s]
 recipe = slapos.recipe.build