Update trac links with gitea links

This replaces all links pointing to trac with their corresponding links
to gitea. Also replace http with https while at it.

Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>

source/maths/BoundingBoxAligned.cpp

@@ -211,7 +211,7 @@ void CBoundingBoxAligned::IntersectFrustumConservative(const CFrustum& frustum)
 {
 	// if this bound is empty, then the result must be empty (we should not attempt to intersect with
 	// a brush, may cause crashes due to the numeric representation of empty bounds -- see
-	// http://trac.wildfiregames.com/ticket/1027)
+	// https://gitea.wildfiregames.com/0ad/0ad/issues/1027)
 	if (IsEmpty())
 		return;
 

source/maths/tests/test_Bound.h

@@ -189,7 +189,7 @@ public:
 	}
 
 	// Verify that transforming a flat AABB to an OBB does not produce NaN basis vectors in the
-	// resulting OBB (see http://trac.wildfiregames.com/ticket/1121)
+	// resulting OBB (see https://gitea.wildfiregames.com/0ad/0ad/issues/1121)
 	void test_degenerate_aabb_to_obb_transform()
 	{
 		// create a flat AABB, transform it with some matrix (can even be the identity matrix),