Only conditionally resolve hosts in nsm-should-check

Only conditionally resolve hosts in nsm-should-check

Libraries like `socks' need to run `nsm-verify-connection' without
performing DNS lookups.  This change allows them to achieve this by
binding `nsm-trust-local-network' to nil around calls to that function.

* lisp/net/nsm.el (nsm-should-check): Rework in a functionally
equivalent way, except forgo calling both `network-lookup-address-info'
and `network-interface-list' unless the various conditions regarding
`nsm-trust-local-network' are first satisfied.  Replace `mapc' with
`dolist' to align with modern sensibilities.   (Bug#53941)

(cherry picked from commit 50deb59aaee2a8d773e95a53c91da7bdb2c5cabd)