add torrent_info constructor overloads to control torrent file limits

[arvidn]

No description provided.

[codecov-io]

Codecov Report

Merging #3877 into RC_1_2 will increase coverage by 0.37%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           RC_1_2    #3877      +/-   ##
==========================================
+ Coverage   73.77%   74.14%   +0.37%     
==========================================
  Files         439      439              
  Lines       59677    59710      +33     
  Branches     8879     8886       +7     
==========================================
+ Hits        44024    44273     +249     
+ Misses      11208    10991     -217     
- Partials     4445     4446       +1

Impacted Files	Coverage Δ
include/libtorrent/torrent_info.hpp	89.23% <ø> (ø)	⬆️
src/torrent_info.cpp	64.86% <16.66%> (-2.51%)	⬇️
include/libtorrent/bt_peer_connection.hpp	79.41% <0%> (-5.89%)	⬇️
src/pe_crypto.cpp	68.44% <0%> (-2.14%)	⬇️
src/error_code.cpp	55.76% <0%> (-1.93%)	⬇️
src/request_blocks.cpp	77.35% <0%> (-1.89%)	⬇️
test/test_ed25519.cpp	97.26% <0%> (-1.37%)	⬇️
src/string_util.cpp	85.36% <0%> (-0.61%)	⬇️
src/udp_tracker_connection.cpp	53.86% <0%> (-0.56%)	⬇️
src/block_cache.cpp	75.46% <0%> (-0.54%)	⬇️
... and 26 more

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