MarcoFalke affed844ba
Merge #19174: refactor: replace CConnman pointers by references in net_processing.cpp
0c8461a88ed66a1f70559fc96646708949b17e4b refactor: replace CConnman pointers by references in net_processing.cpp (Sebastian Falbesoner)

Pull request description:

  This is a follow-up to the recently merged PR https://github.com/bitcoin/bitcoin/pull/19053, replacing ~~two more types of~~ one more type of pointer (CConnman) by references to increase the code quality -- pointers should either check for `nullptr` or be replaced by references, and the latter strategy seems to be more reasonable.

  Again, to keep the review burden managable, the changes are kept simple,
  * only tackling `CConnman*` ~~and `BanMan*`~~ pointers
  * only within the net_processing module, i.e. no changes that would need adaption in other modules
  * keeping the names of the variables as they are

ACKs for top commit:
  jnewbery:
    utACK 0c8461a88ed66a1f70559fc96646708949b17e4b
  MarcoFalke:
    ACK 0c8461a88ed66a1f70559fc96646708949b17e4b 🕧

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