Whether to consider adding MPLS functionality

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Whether to consider adding MPLS functionality， eg VPLS. L3 VPN etc.

![Screenshot of demo.mt.lv - MPLS at admin@demo.mt.lv - Webfig v6.40.4 (stable) on RB433 (mips).jpg](/public/imported_attachments/1/Screenshot of demo.mt.lv - MPLS at admin@demo.mt.lv - Webfig v6.40.4 (stable) on RB433 (mips).jpg)
![Screenshot of demo.mt.lv - MPLS at admin@demo.mt.lv - Webfig v6.40.4 (stable) on RB433 (mips).jpg_thumb](/public/imported_attachments/1/Screenshot of demo.mt.lv - MPLS at admin@demo.mt.lv - Webfig v6.40.4 (stable) on RB433 (mips).jpg_thumb)