Final tweaks to #83/#89 (for release 1.5.4)

1. Revert panic back into the code.

- Fort SHOULD die as soon as it realizes the VRP table is corrupted, as
  we should not send garbage to the routers.
- Also, I'm not entirely sure the code would not crash later anyway,
  since the table is, in fact, corrupted.
- Plus, if it doesn't crash, there would be no core dump to further
  analyze the bug.

2. Point bug output to the currently active bug report

Might help us get some output earlier.

src/output_printer.c

@@ -48,10 +48,8 @@ print_roa_csv(struct vrp const *vrp, void *arg)
 {
 	FILE *out = arg;
 
-	if (vrp->addr_fam != AF_INET && vrp->addr_fam != AF_INET6) {
-		/* pr_crit("Unknown family type"); TODO (issue83) */
-		return 0;
-	}
+	if (vrp->addr_fam != AF_INET && vrp->addr_fam != AF_INET6)
+		pr_crit("Unknown family type");
 
 	fprintf(out, "AS%u,%s/%u,%u\n", vrp->asn,
 	    inet_ntop(vrp->addr_fam, &vrp->prefix, addr_buf, INET6_ADDRSTRLEN),

src/rtr/db/db_table.c

@@ -274,7 +274,8 @@ find_bad_vrp(char const *prefix, struct db_table *table)
 	HASH_ITER(hh, table->roas, node, tmp) {
 		vrp = &node->data;
 		if (vrp->addr_fam != AF_INET && vrp->addr_fam != AF_INET6) {
-			pr_op_err("%s: VRP corrupted! [%u %s/%u-%u %u] %u/%u",
+			pr_crit("%s: VRP corrupted! [%u %s/%u-%u %u] %u/%u "
+			    "(Please report this output to https://github.com/NICMx/FORT-validator/issues/89)",
 			    prefix,
 			    vrp->asn,
 			    addr2str6(&vrp->prefix.v6, buffer),
@@ -283,7 +284,6 @@ find_bad_vrp(char const *prefix, struct db_table *table)
 			    vrp->addr_fam,
 			    roa_counter,
 			    roa_count);
-			return;
 		}
 		roa_counter++;
 	}

src/rtr/db/delta.c

@@ -141,7 +141,8 @@ deltas_add_roa(struct deltas *deltas, struct vrp const *vrp, int op,
 		return deltas_v6_add(get_deltas_array6(deltas, op), &delta.v6);
 	}
 
-	pr_val_err("Unknown protocol: [%u %s/%u-%u %u] %c %u/%u",
+	pr_crit("Unknown protocol: [%u %s/%u-%u %u] %c %u/%u "
+	    "(Please report this output to https://github.com/NICMx/FORT-validator/issues/89)",
 	    vrp->asn,
 	    addr2str6(&vrp->prefix.v6, buffer),
 	    vrp->prefix_length,
@@ -150,7 +151,6 @@ deltas_add_roa(struct deltas *deltas, struct vrp const *vrp, int op,
 	    r1type,
 	    roa_counter,
 	    roa_count);
-	return 0;
 }
 
 int