try encode web seed redirect location #3016

Job	Run time
build (asio-debugging=on picker-debugging=on)	21m 9s
check headers	4m 17s
build (extensions=off logging=off streaming=off super-seeding=off share-mode=off predictive-piece...	16m 42s
clang-tidy	10m 0s
build (crypto=gcrypt)	18m 27s
build dist (ubuntu-20.04)	18m 6s
build (mmap-disk-io=off)	20m 30s
Fuzzers	16m 1s
pre-commit	59s
build dist (ubuntu-22.04)	17m 12s
Simulations	19m 18s
Tests (webtorrent=on address-sanitizer=norecover undefined-sanitizer=norecover crypto=openssl)	36m 40s
Tests (toolset=clang logging=off address-sanitizer=norecover undefined-sanitizer=norecover)	12m 1s
Tests (thread-sanitizer=norecover crypto=openssl release debug-symbols=on cxxflags=-Wno-tsan)	13m 35s
Tests (crypto=gnutls)	12m 58s
Tests (deprecated-functions=off)	12m 15s
	4h 10m 10s

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