Rework how nickname protection works.

- Rename the command and module from kill to protect (this command
  hasn't actually killed users in a long time).
- Replace QUICK/IMMED with a duration option.

data/anope.example.conf

@@ -746,8 +746,8 @@ log
  *   nickserv/getemail         nickserv/suspend       nickserv/ajoin           nickserv/list
  *
  *   nickserv/saset/autoop   nickserv/saset/display    nickserv/saset/email    nickserv/saset/greet
- *   nickserv/saset/kill     nickserv/saset/keepmodes  nickserv/saset/language  nickserv/saset/message
- *   nickserv/saset/neverop  nickserv/saset/noexpire   nickserv/saset/password  nickserv/saset/private
+ *   nickserv/saset/keepmodes  nickserv/saset/language  nickserv/saset/message nickserv/saset/neverop
+ *   nickserv/saset/noexpire   nickserv/saset/password  nickserv/saset/private nickserv/saset/protect
  *   nickserv/saset/url
  *
  *   hostserv/set            hostserv/del           hostserv/list

data/nickserv.example.conf

@@ -126,7 +126,7 @@ module
 	 * This directive is optional, if left blank, the options will default to memo_signon, and
 	 * memo_receive. If you really want no defaults, use "none" by itself as the option.
 	 */
-	defaults = "killprotect ns_private hide_email hide_mask memo_signon memo_receive autoop"
+	defaults = "autoop hide_email hide_mask memo_receive memo_signon ns_private protect"
 
 	/*
 	 * The minimum length of time between consecutive uses of NickServ's REGISTER command. This
@@ -171,11 +171,25 @@ module
 	hidenetsplitquit = no
 
 	/*
-	 * If set, is the length of time NickServ's killquick and kill options wait before
-	 * forcing users off of protected nicknames.
+	 * The default period to force users to stop using a protected nickname after.
+	 *
+	 * Defaults to 1 minute.
 	 */
-	killquick = 20s
-	kill = 60s
+	defaultprotect = 1m
+
+	/*
+	 * The minimum period that a user can have a user forced off their protected nickname after.
+	 *
+	 * Defaults to 10 seconds.
+	 */
+	minprotect = 10s
+
+	/*
+	 * The maximum period that a user can have a user forced off their protected nickname after.
+	 *
+	 * Defaults to 10 minutes.
+	 */
+	maxprotect = 10m
 
 	/*
 	 * If set, forbids the registration of nicks that contain an existing
@@ -596,28 +610,6 @@ module
 command { service = "NickServ"; name = "SET KEEPMODES"; command = "nickserv/set/keepmodes"; }
 command { service = "NickServ"; name = "SASET KEEPMODES"; command = "nickserv/saset/keepmodes"; permission = "nickserv/saset/keepmodes"; }
 
-/*
- * ns_set_kill
- *
- * Provides the commands nickserv/set/kill and kickserv/saset/kill.
- *
- * Used for configuring nickname protection.
- */
-module
-{
-	name = "ns_set_kill"
-
-	/*
-	 * Allow the use of the IMMED option in the NickServ SET KILL command.
-	 *
-	 * This directive is optional.
-	 */
-	#allowkillimmed = yes
-}
-
-command { service = "NickServ"; name = "SET KILL"; command = "nickserv/set/kill"; }
-command { service = "NickServ"; name = "SASET KILL"; command = "nickserv/saset/kill"; permission = "nickserv/saset/kill"; }
-
 /*
  * ns_set_language
  *
@@ -662,6 +654,22 @@ command { service = "NickServ"; name = "SASET URL"; command = "nickserv/saset/mi
 #command { service = "NickServ"; name = "SET TIMEZONE"; command = "nickserv/set/misc"; misc_description = _("Associate a time zone with your account"); }
 #command { service = "NickServ"; name = "SASET TIMEZONE"; command = "nickserv/saset/misc"; misc_description = _("Associate a time zone with this account"); permission = "nickserv/saset/timezone"; group = "nickserv/admin"; }
 
+/*
+ * ns_set_protect
+ *
+ * Provides the commands nickserv/set/protect and kickserv/saset/protect.
+ *
+ * Used for configuring nickname protection.
+ */
+module { name = "ns_set_protect" }
+
+command { service = "NickServ"; name = "SET PROTECT"; command = "nickserv/set/protect"; }
+command { service = "NickServ"; name = "SASET PROTECT"; command = "nickserv/saset/protect"; permission = "nickserv/saset/kill"; }
+
+# For compatibility with Anope 2.0.
+command { service = "NickServ"; name = "SET KILL"; command = "nickserv/set/protect"; hide = true; }
+command { service = "NickServ"; name = "SASET KILL"; command = "nickserv/saset/protect"; permission = "nickserv/saset/protect"; hide = true; }
+
 /*
  * ns_suspend
  *