`dev/easyrsa-tools.lib` missing in release build

[freddebacker]

`dev/easyrsa-tools.lib` missing in release build

[TinCanTech]

worked around by downloading it directly from github

For the time being, downloading is the correct solution.

The rational is:
easyrsa v3.1.7 carries around a lot of old code, including the status reports you mentioned, certificate renewal and the upgrade procedure:

• Status reports are still a work in progress; while they work, they are cumbersome. Development can continue without disturbing easyrsa code.
• Command renew has been replaced by better code. The renew command did not work properly; it would drop some certificate attributes during renewal and the work required to make renew work correctly is an unnecessary maintenance burden. Now, if a certificate is expiring/expired, it can be replaced with a new certificate with all the same attributes as the original, via sign-req command.
• Upgrading the CA/PKI is now considered to be obsoleted. The code was removed.

easyrsa v3.2.0 is the start of a new version, that will not be overly burdened by old code.