+ Patch from Sean Cashin that fixes filter behaviour

Filters would not accept apostrophes, now they do.
Thanks Sean Cashin (http://github.com/scashin133)!

Author: kschiess

lib/net/ldap/filter.rb

@@ -694,7 +694,7 @@ def parse_filter_branch(scanner)
         scanner.scan(/\s*/)
         if op = scanner.scan(/<=|>=|!=|:=|=/)
           scanner.scan(/\s*/)
-          if value = scanner.scan(/(?:[-\w*.+@=,#\$%&!\s]|\\[a-fA-F\d]{2})+/)
+          if value = scanner.scan(/(?:[-\w*.+@=,#\$%&!'\s]|\\[a-fA-F\d]{2})+/)
             # 20100313 AZ: Assumes that "(uid=george*)" is the same as
             # "(uid=george* )". The standard doesn't specify, but I can find
             # no examples that suggest otherwise.

spec/unit/ldap/filter_spec.rb

@@ -44,5 +44,10 @@
       end
     end
   end
+  describe "<- .construct" do
+    it "should accept apostrophes in filters (regression)" do
+      Net::LDAP::Filter.construct("uid=O'Keefe").to_rfc2254.should == "(uid=O'Keefe)"
+    end 
+  end
 
 end