Two more SRFIs ported to CHICKEN 6

[Diego A. Mundo via Chicken-users]

- srfi-123: 
https://git.sr.ht/~dieggsy/srfi-123/blob/chicken-6/srfi-123.release-info
- srfi-105: 
https://git.sr.ht/~dieggsy/srfi-105/blob/master/srfi-105.release-info

Tested srfi-123 with test-new-egg, srfi-105 depends on it.

Diego