faster SRCINFO parsing + memory-based building

Switched to parsing srcinfo with channels on all available cpus, speeding
up srcinfo-parsing and queue generation by a lot.

New memory-limit based building will max out the available memory while
not building the same packages at the same time for different marchs,
fixing some long-standing bugs like firefox not building at the same time
because the same ports are used for profile-based optimization. This
also drops the artificial delay on build-start, speeding up things even
more. This also means there is no hard-coded limit on how many packages
can be build at once anymore. As long as there is RAM available, builds will be
started.

package.go

@@ -5,11 +5,11 @@ import (
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqljson"
 	"fmt"
-	"git.harting.dev/ALHP/ALHP.GO/ent"
-	"git.harting.dev/ALHP/ALHP.GO/ent/dbpackage"
 	log "github.com/sirupsen/logrus"
 	"os/exec"
 	"path/filepath"
+	"somegit.dev/ALHP/ALHP.GO/ent"
+	"somegit.dev/ALHP/ALHP.GO/ent/dbpackage"
 	"strings"
 )