RDP: improve detection over UDP #2814

Job	Run time
Test Utils (ubuntu-latest)	3m 9s
Python Bindings (ubuntu-latest)	1m 29s
ubuntu-latest x86_64 --with-local-libgcrypt cc	6m 57s
ubuntu-latest x86_64 cc	6m 23s
ubuntu-20.04 x86_64 --with-local-libgcrypt cc	5m 57s
ubuntu-20.04 x86_64 cc	7m 6s
macOS-latest x86_64 --with-local-libgcrypt cc	5m 2s
macOS-latest x86_64 cc	6m 11s
macos-11 x86_64 --with-local-libgcrypt cc	5m 46s
macos-11 x86_64 cc	5m 10s
windows-latest x86_64 --with-local-libgcrypt cc	27m 10s
windows-latest x86_64 cc	13m 56s
ubuntu-20.04 x86_64 gcc-7 --with-pcre --with-maxminddb --with-sanitizer	11m 3s
ubuntu-22.04 x86_64 gcc-12 --with-pcre --with-maxminddb --with-sanitizer --with-lto-and-gold-linker	12m 1s
ubuntu-20.04 x86_64 clang-7 --with-pcre --with-maxminddb --with-sanitizer	11m 14s
ubuntu-22.04 x86_64 clang-14 --with-pcre --with-maxminddb --with-sanitizer --with-lto-and-gold-linker	11m 45s
ubuntu-latest x86_64 cc --with-pcre --with-maxminddb --with-thread-sanitizer	22m 25s
ubuntu-latest x86_64 cc --with-pcre --with-maxminddb --with-sanitizer nBPF	7m 8s
ubuntu-22.04 x86_64 clang-14 --with-pcre --with-maxminddb --with-memory-sanitizer	13m 46s
macOS-latest x86_64 cc --with-pcre --with-maxminddb	5m 17s
macos-12 x86_64 cc --with-pcre --with-maxminddb	6m 31s
ubuntu-latest arm64 cc --with-pcre --with-maxminddb	20m 30s
ubuntu-latest armhf cc --with-pcre --with-maxminddb --with-sanitizer	36m 17s
ubuntu-latest s390x cc --with-pcre --with-maxminddb	24m 15s
	4h 36m 28s

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