[patch] no crumbs

[carmen]

in the spirit of minimal-impact 'leave no trace' principles, this patch adds a missing feature, the ability to remove cookies.

usage:

@cookies.redbean = nil


a side note, the trunk seems to be broken when using Markaby. i've tested this out using ngrep and firefox and opera w/ controllers that just return strings in any case..
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Index: lib/camping.rb
===================================================================
--- lib/camping.rb	(revision 194)
+++ lib/camping.rb	(working copy)
@@ -25,7 +25,7 @@
 "post" and e.CONTENT_TYPE == "application/x-www-form-urlencoded"
 q.u C.qsp(@in.read)end;@cookies, at input=@k.dup,q.dup end;def service*a
 @body=send(@method,*a)if respond_to?@method;@headers["Set-Cookie"]=@cookies.map{
-|k,v|"#{k}=#{C.escape(v)}; path=#{self/'/'}"if v!=@k[k]}-[nil];self end;def to_s
+|k,v|"#{k}=#{C.escape(v)};#{"max-age=0;"if !v}path=#{self/'/'}"if v!=@k[k]}-[nil];self end;def to_s
 a=[];@headers.map{|k,v|[*v].map{|x|a<<"#{k}: #{x}"}};"Status: #{@status}#{Z+a*Z+
 Z*2+ at body}"end;end;X=module Controllers;@r=[];class<<self;def r;@r;end;def R*u
 r=@r;Class.new{meta_def(:urls){u};meta_def(:inherited){|x|r<<x}}end;def M;def M
Index: lib/camping-unabridged.rb
===================================================================
--- lib/camping-unabridged.rb	(revision 194)
+++ lib/camping-unabridged.rb	(working copy)
@@ -438,7 +438,7 @@
     # on before and after overrides with Camping.
     def service(*a)
       @body = send(@method, *a) if respond_to? @method
-      @headers['Set-Cookie'] = @cookies.map { |k,v| "#{k}=#{C.escape(v)}; path=#{self/"/"}" if v != @k[k] } - [nil]
+      @headers['Set-Cookie'] = @cookies.map { |k,v| "#{k}=#{C.escape(v)};#{"max-age=0;"if !v}path=#{self/"/"}" if v != @k[k] } - [nil]
       self
     end