v0.1.0

NX Node v0.1.0

Nexora Node is now NX Node

Update the panel first. NX Panel v0.1.0 moves its own server (see its
release). Then update each node from the panel's Nodes page, where it shows
Needs migration, or run the install command shown there on the node.

• The node lives in /opt/nx-node and /var/opt/nx-node and runs as nx-node (ghcr.io/nx-panel/node for Docker). The install script moves a node installed under the old name, by script or in Docker, keeping its method, its address and its certificates. If a step fails, the old node is put back.
• The install hands the node the panel's new client certificate. A node not yet updated keeps working with the previous one until then.
• Environment variables are NX_* (NX_STATE_DIR, NX_NODE_LISTEN, …).
• Nothing else changes in this release: the protocols and features are those of v0.0.6.