Fix support for HDF5 URL

Because in 'patch1' the fraction of digits is only 1/6 it was failed to
be recognized as version. Rework version detection heuristic to
recpognize 'patch' and similar words as versions and increase ndigit
threshold - since we now do not need to keep it so low as 1/5 due to
e.g. slapospatched012 and similar cases.

Occured in Wendelin.

nxdbom/__init__.py

@@ -355,7 +355,10 @@ def _namever(url, failonerr):
         for _ in v:
             if _.isnumeric():
                 v_ndigit += 1
-        if v_ndigit < (len(v)-1) / 5:   # doesn't look like a version
+        isver = 'patch' in v            or \
+                'slapospatched' in v    or \
+                v_ndigit > (len(v)-1) / 3
+        if not isver:   # doesn't look like a version
             break
         name = name[:m.start()]
         ver = v + ver

nxdbom/nxdbom_test.py

@@ -45,6 +45,7 @@ from os.path import dirname, exists
     ('https://github.com/unicode-org/icu/releases/download/release-58-2/icu4c-58_2-src.tgz',  'icu4c', '58_2'),
     ('https://lab.nexedi.com/bk/onlyoffice_core/repository/archive.tar.bz2?ref=8a40eb47bd80a40ecde14c223525b21852d2fc9f',  'onlyoffice_core', '8a40eb47bd80a40ecde14c223525b21852d2fc9f'),
     ('http://snowball.tartarus.org/dist/libstemmer_c.tgz',  'libstemmer_c', None),
+    ('https://support.hdfgroup.org/ftp/HDF5/releases/hdf5-1.10/hdf5-1.10.0-patch1/src/hdf5-1.10.0-patch1.tar.bz2',  'hdf5', '1.10.0-patch1'),
 ])
 def test_namever(url, nameok, verok):
     assert nxdbom.namever(url) == (nameok, verok)