Fixes#8492
This introduces "nopfs" as a preloaded plugin into Kubo
with support for denylists from https://github.com/ipfs/specs/pull/383
It automatically makes Kubo watch *.deny files found in:
- /etc/ipfs/denylists
- $XDG_CONFIG_HOME/ipfs/denylists
- $IPFS_PATH/denylists
* test: Gateway.NoFetch and GatewayOverLibp2p
adds missing tests for "no fetch" gateways one can expose,
in both cases the offline mode is done by passing custom
blockservice/exchange into path resolver, which means
global path resolver that has nopfs intercept is not used,
and the content blocking does not happen on these gateways.
* fix: use offline path resolvers where appropriate
this fixes the problem described in
https://github.com/ipfs/kubo/pull/10161#issuecomment-1782175955
by adding explicit offline path resolvers that are backed
by offline exchange, and using them in NoFetch gateways
instead of the default online ones
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Co-authored-by: Henrique Dias <hacdias@gmail.com>
Co-authored-by: Marcin Rataj <lidel@lidel.org>
