Make 'popups' more intuitive.

vimperator/NEWS

@@ -17,6 +17,7 @@
       and <C-A> are equivalent, to map the uppercase character use <C-S-A>.
       (this might change again, as this is REALLY inconsistent, and i don't
        know if I like copying bugs)
+    * IMPORTANT: 'popups' now takes a stringlist rather than a number.
 
     * add [c]:keepalt[c]
     * add [c]:styledisable[c], [c]:styleenable[c], and [c]:styletoggle[c]

vimperator/locale/en-US/options.txt

@@ -613,7 +613,7 @@ ____
 
 
 |\'pps'| |\'popups'| +
-||'popups' 'pps'|| number (default: 1)
+||'popups' 'pps'|| stringlist (default: tab)
 ____
 Define where to show requested popup windows.
 Does not apply to windows which are opened by middle clicking a link,
@@ -621,13 +621,15 @@ they always open in a new tab. Possible values:
 
 [frame="topbot",grid="none",cols="1,10"]
 |===============================================================================
-|*0*|Force to open in the current tab (Warning: this can stop some web sites from working correctly!)
-|*1*|Always open in a new tab
-|*2*|Open in a new window if it has a specific requested size (default in Firefox)
-|*3*|Always open in a new window
-|*4*|Open in the same tab unless it has a specific requested size
+|*tab*     | Open popups in a new tab
+|*window*  | Open popups in a new window
+|*resized* | Open resized popups in a new window
 |===============================================================================
 
+If neither *tab* nor *window* is provided, all popups open in the current tab.
+*tab* and *window* are mutually exclusive, and the last one listed is
+effective.
+
 Note: This option does not change the popup blocker of Firefox in any way.
 ____