net/vinagre: patch for support passwords more than 8 chars

• support ARD (OS-X remote desktop)
• increase the lenght of passwords which can be entered from 8 to 32

The upstream issue with 9 years discussion:

https://bugzilla.gnome.org/show_bug.cgi?id=652334

Idea of the patch with description:

https://bugzilla.gnome.org/show_bug.cgi?id=666598

The max length 32 from here:

https://www.mac-forums.com/threads/maximum-length-of-passwords.317066/

PR: 248196
Submitted by: VVD <vvd@unislabs.com>
Approved by: desktop