Meta characters should be encoded in ticket notification mail

[Jun Omae]

When meta characters in MIME is used in [project] name and ticket summary, those characters aren't encoded in ticket notification mail. We should escape those characters.

1. Set 0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?= to [project] name
2. Enter =?utf-8?b?VHJhYw==?= to summary of ticket and create the ticket

Result:

1. The from shows 0.12-stable "quoted" Trac
   • should be 0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?=
2. The subject shows Re: [0.12-stable \"quoted\" Trac] #30008: Trac
   • should be Re: [0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?=] #30008: =?utf-8?b?VHJhYw==?=

MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
From: "0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?=" <trac@localhost.********>
X-Trac-Version: 0.12.5
Precedence: bulk
Auto-Submitted: auto-generated
X-Mailer: Trac 0.12.5, by Edgewall Software
To: jun66j5+trac-0.12.5@gmail.com
X-Trac-Project: 0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?=
Date: Fri, 24 Jan 2014 03:44:38 -0000
Reply-To: 
X-URL: 
Subject: Re: [0.12-stable \"quoted\" =?utf-8?b?VHJhYw==?=] #30008:
 =?utf-8?b?VHJhYw==?=
X-Trac-Ticket-URL: http://********:3000/ticket/30008#comment:1
Message-ID: <034.37649017d477ccfc6fd6957e65017df9@localhost>
References: <019.39b1cd5d99f1208ec43f4d8616420d30@localhost>
X-Trac-Ticket-ID: 30008
In-Reply-To: <019.39b1cd5d99f1208ec43f4d8616420d30@localhost>