Always use GET for Zope servers.

doc/changelog.txt

@@ -1,5 +1,10 @@
 7.8 "" (released xx.xx.2012)
 
+Fixes:
+- checking: Always use GET for Zope servers since their HEAD support
+  is broken.
+  Closes: SF bug #3522710
+
 Changes:
 - documentation: Made the --ignore-url documentation more clear.
   Patch from Charles Jones.

linkcheck/checker/httpurl.py

@@ -280,8 +280,7 @@ class HttpUrl (internpaturl.InternPatternUrl, proxysupport.ProxySupport):
                 mime = self.get_content_type()
                 poweredby = self.getheader('X-Powered-By', u'')
                 server = self.getheader('Server', u'')
-                if ((mime in ('application/octet-stream', 'text/plain') and
-                  (poweredby.startswith('Zope') or server.startswith('Zope')))
+                if (poweredby.startswith('Zope') or server.startswith('Zope')
                  or ('ASP.NET' in poweredby and 'Microsoft-IIS' in server)):
                     # Zope or IIS server could not get Content-Type with HEAD
                     # see http://intermapper.com.dev4.silvertech.net/bogus.aspx