[libmicrohttpd] From LGPL 3.0 to LGPL 2.1?

[silvioprog]

Hello friends.

After updating my git, I found the following commit log:

"Updated README and COPYING

Note: library code is licensed under LGPLv2.1+ or eCOS terms/

Come testsuite programs are licensed under GPLv3 terms."

Could you explain the main reasons? (Any advantages/disadvantages?)

I would like to understand it because I'm going to upgrade MHD in my project.

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Silvio Clécio