Vanilla lwIP 2.1.0 fetched from https://git.savannah.nongnu.org/git/lwip.git

Branch/Tag: STABLE-2_1_0_RELEASE
SHA1 ID: e6a8415df332ee34d7af02255b2aa1e8ee74348f

With the following addons:
	- Vanilla lwIP contrib 2.1.0 fetched from https://git.savannah.nongnu.org/git/lwip/lwip-contrib.git (branch/tag: STABLE-2_1_0_RELEASE, sha1id: 35b011d4cf4c4b480f8859c456587a884ec9d287)

Restructured with toki-baseliner, revision 7dc0f8e (dirty).