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  Input : feat: implement the last 2 missing network struct functions
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✔️ Validator: COMMIT

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  Input : feat: implement the last 2 missing network struct functions
  and make use of them
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✔️ Validator: DESCRIPTION

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  Input : - [x] implement getaddrinfo and freeaddrinfo

• replace all uses of getaddrinfo()
  • addr_resolve()
  • net_getipport()
• separate out the network struct from network.h/c
• test os_network_no_dns()

This pr finally allows us to implement a regression test for #2361

This pr implements a different approach to disabling DNS, compared to #2694, here we can simply replace the functions pointers in the network struct with dummies/stubs.

This change is 

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