Add channels.cfg

Related: versioning scheme discussion in https://gitlab.com/postmarketOS/postmarketos/-/issues/20

• add channels.cfg as described here
• protect branch properly in gitlab will be on master branch, that's easier to use, see wiki page for details

added category::infrastructure label

changed the description

By Oliver Smith on 2020-04-02T21:15:54

mentioned in commit b407118e

By Oliver Smith on 2020-04-10T18:52:26

mentioned in merge request !1141 (merged)

By Oliver Smith on 2020-04-10T18:57:18

mentioned in commit 71ebb6e9

By Oliver Smith on 2020-04-11T00:22:06

mentioned in commit c80d1c5f

By Oliver Smith on 2020-04-11T00:26:20

closed via merge request !1141 (merged)

By Oliver Smith on 2020-04-11T10:20:56