Bug 6444 Corrects encoding problems in subscription-add.pl

Bug 6444 Corrects encoding problems in subscription-add.pl

When searching for a vendor, if the vendor has accented character in its
name, the vendor's name that's added in the form of subscription-add.pl
is encoded incorrectly.

[2011.06.01] F. Demians. Port it to 3.4

Signed-off-by: Colin Campbell <colin.campbell@ptfs-europe.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
(cherry picked from commit ddcf63d29b7f4fc20e46765b76df95e037caa2d6)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>