Quartus 2 13.0sp1 Download Fails

[cepawiel]

The curl command in Altera_Quartus_II_13.0sp1/Makefile currently just downloads a 0 byte file. Adding a -L flag to the command fixes it. I haven't checked the other versions of Quartus yet, but I'd assume they suffer from the same issue as the URLs look to be of the same format. If nobody gets to it before me I'll make a pull request with these changes.

[halfmanhalftaco]

Yeah, I think Intel started moving a lot of the download URLs, this could certainly use a refresh and a check to make sure download links still work.