net-p2p/gtk-gnutella: the port had been updated and improved (+)
- Update to version 1.2.1, which now needs GNU make to build
- Switch to SourceForge where official releases are published; this also means shorter distfile name, correctly preserved modification time, and alleviates the need for DISTVERSIONPREFIX abomination
- Remove ONLY_FOR_ARCHS constraint: there should not be anything architecture-specific about server/client program for Gnutella, modulo some fragility in their custom memory allocator
- Force previous (as in version 1.1.15) alignment value on i386 and likely other 32-bit architectures to unbreak the build there
- Drop non-standard IRC line from the port description and improve creator's attribution while I'm here
PR: 258276