[MP] Fix relay protocol routing with negative targets #195

Job	Run time
📊 Static checks / Code style, file formatting, and docs	45s
🍏 iOS / Template (target=template_release)	10m 17s
🤖 Android / Editor (target=editor)	24m 7s
🐧 Linux / Editor w/ Mono (target=editor)	40m 21s
🤖 Android / Template arm32 (target=template_release, arch=arm32)	16m 48s
🌐 Web / Template w/ threads (target=template_release, threads=yes)	26m 24s
🌐 Web / Template w/o threads (target=template_release, threads=no)	26m 14s
🐧 Linux / Editor with doubles and GCC sanitizers (target=editor, tests=yes, dev_build=yes, scu_build=yes, precision=double, use_asan=yes, use_ubsan=yes, linker=gold)	46m 33s
🤖 Android / Template arm64 (target=template_release, arch=arm64)	16m 42s
🏁 Windows / Editor (target=editor, tests=yes)	46m 29s
🐧 Linux / Editor with clang sanitizers (target=editor, tests=yes, dev_build=yes, use_asan=yes, use_ubsan=yes, use_llvm=yes, linker=lld)	35m 8s
🐧 Linux / Editor with ThreadSanitizer (target=editor, tests=yes, dev_build=yes, use_tsan=yes, use_llvm=yes, linker=lld)	32m 0s
🏁 Windows / Template (target=template_release)	34m 50s
🐧 Linux / Template w/ Mono (target=template_release)	5m 27s
🍎 macOS / Editor (target=editor, tests=yes)	29m 39s
🐧 Linux / Minimal template (target=template_release, everything disabled)	1m 40s
🍎 macOS / Template (target=template_release)	2m 53s
🪲 Godot CPP / Build and test Godot CPP	8m 1s
	6h 44m 18s

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