[IRCServices Coding] 2 small bugs

[Martin Pels]

1.
when using nickserv dropnick the dropped nick gets displayed as (null)

for example, when doing: /msg nickserv dropnick FooBar
Services replies:
[12:29] -NickServ- Nickname (null) and all linked nicknames have been
dropped.

2.
When a registered nickname does not have a last quit message in its info
display the following happens when viewing the info online:

      Registered to:   FooBar
      Time registered:   Dec 31 14:05:38 2001
      Last seen address:   foo at bar
      Last seen on:   Jan 20 23:26:57 2002
      Last quit message:   Jan 20 23:26:57 2002


The last quitmessage should be empty here. Instead the Last seen on value
gets shown again, and the services logfile shows a bug:
[Jan 28 23:10:37 2002] httpd/main: BUG: http_quote_html(): str is NULL!