fixes issue #531, when extracting user email, we check it against the database,

and return user default email. Also if no email is present check the username
for matching targets.

rhodecode/lib/helpers.py

@@ -396,8 +396,14 b' def is_hg(repository):'
 
 
 def email_or_none(author):
+    # extract email from the commit string
     _email = email(author)
     if _email != '':
+        # check it against RhodeCode database, and use the MAIN email for this
+        # user
+        user = User.get_by_email(_email, case_insensitive=True, cache=True)
+        if user is not None:
+            return user.email
         return _email
 
     # See if it contains a username we can get an email from

rhodecode/templates/changeset/changeset.html

@@ -53,7 +53,7 b''
 	             <div class="left">
 	                 <div class="author">
 	                     <div class="gravatar">
-	                         <img alt="gravatar" src="${h.gravatar_url(h.email(c.changeset.author),20)}"/>
+	                         <img alt="gravatar" src="${h.gravatar_url(h.email_or_none(c.changeset.author),20)}"/>
 	                     </div>
 	                     <span>${h.person(c.changeset.author)}</span><br/>
 	                     <span><a href="mailto:${h.email_or_none(c.changeset.author)}">${h.email_or_none(c.changeset.author)}</a></span><br/>