Feature/ssl cert management (#442)

* Adds core logic API for SSL Certificate Management

* Update appmgr/src/net/ssl.rs

Co-authored-by: Aiden McClelland <3732071+dr-bonez@users.noreply.github.com>

appmgr/migrations/20210629193146_Init.sql

@@ -27,4 +27,13 @@ CREATE TABLE IF NOT EXISTS ssh_keys
     openssh_pubkey  TEXT NOT NULL,
     created_at      TEXT NOT NULL,
     PRIMARY KEY (fingerprint)
+);
+CREATE TABLE IF NOT EXISTS certificates
+(
+    id INTEGER PRIMARY KEY, -- Root = 0, Int = 1, Other = 2..
+    priv_key_pem TEXT NOT NULL,
+    certificate_pem TEXT NOT NULL,
+    lookup_string TEXT UNIQUE,
+    created_at TEXT,
+    updated_at TEXT
 );