add a patch to fix an issue in 'ssh -i'

this pacth fixes hashicorp/vagrant#7863

hashicorp/vagrant#7862

sysutils/vagrant/Makefile

@@ -4,7 +4,7 @@
 PORTNAME=	vagrant
 PORTVERSION=	1.8.1
 DISTVERSIONPREFIX=	v
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	sysutils rubygems devel
 
 MAINTAINER=	joe@thrallingpenguin.com

sysutils/vagrant/files/percent_expand.patch

@@ -0,0 +1,17 @@
+diff --git a/lib/vagrant/util/ssh.rb b/lib/vagrant/util/ssh.rb
+index faa965c..243ce9d 100644
+--- lib/vagrant/util/ssh.rb
++++ lib/vagrant/util/ssh.rb
+@@ -129,7 +129,11 @@ module Vagrant
+         # If we're not in plain mode and :private_key_path is set attach the private key path(s).
+         if !plain_mode && options[:private_key_path]
+           options[:private_key_path].each do |path|
+-            command_options += ["-i", path.to_s]
++
++            # Use '-o' instead of '-i' because '-i' does not call
++            # percent_expand in misc.c, but '-o' does. when passing the path,
++            # replace '%' in the path with '%%' to escape the '%'
++            command_options += ["-o", "IdentityFile=%s" % [path.to_s.gsub('%', '%%')]]
+           end
+         end
+