add ppa2pup gawk no crypto + (download file name hacks)

I tried to simplify the merge request for adding ppa2pup_awk. (See: Merge Request #4 )

Consequently, I removed changes related to 0setup and I removed references to hash/signature checking in the merge request. However, For this to work properly, I added some hacks related to pkg_download() and pkg_get(), so that pkg_get() can find the downloaded package if the filename differs from the package name. The issue here is whether or not to include the epoch number in the package name (See Issue #73 note_250343273)