Moved away from deprecated SGMLlib parser

I'd heard that the SGMLlib parser had been deprecated in favor of
HTMLParser, so now I've moved to that.

htmlparser.py

@@ -17,33 +17,35 @@
 # along with 4grab.  If not, see <http://www.gnu.org/licenses/>.
 ######################################################################
 
-import sgmllib
+from HTMLParser import HTMLParser, HTMLParseError
 import re
 
-class MyParser(sgmllib.SGMLParser):
-    def __init__(self, verbose=0):
-        sgmllib.SGMLParser.__init__(self, verbose)
+class MyParser(HTMLParser):
+    def __init__(self):
+        HTMLParser.__init__(self)
 
         self.hyperlinks = []
         self.url_reg = re.compile('res/\d+\Z')
-        self.prev = ""
 
     def parse(self, s):
         self.feed(s)
         self.close()
 
-    def start_a(self, attributes):
-        for name, value in attributes:
-            if name == "href":
+    def handle_starttag(self, tag, attrs):
+        prev = ""
+
+        if tag == 'a':
+            for name, value in attrs:
+                if name == 'href':
                     if self.url_reg.search(value) != None:
-                    if self.prev != value:
+                        if prev != value:
                             self.hyperlinks.append(value)
-                        self.prev = value
+                            prev = value
 
     def get_hyperlinks(self):
         return self.hyperlinks
 
 class MySubParser(MyParser):
-    def __init__(self, verbose=0):
-        MyParser.__init__(self, verbose)
+    def __init__(self):
+        MyParser.__init__(self)
         self.url_reg = re.compile('/src/\d+\.\w{3,4}\Z')