Feature request: possibility to specify constraints on multiple mappings/... at once

[maxkratz]

Currently, one has to specify the following constraints on two different mappings:

[...]
constraint -> mapping::srv2srv {
	self.value() <= self.variables().index
}
constraint -> mapping::sw2node {
	self.value() <= self.variables().index
}
[...]

A nice shortcut would be a possibility to specify these two constrains in one block:

[...]
constraint -> mapping::srv2srv, mapping::sw2node {
	self.value() <= self.variables().index
}
[...]