0c41c10830 doc: Remove shouty enums in net_processing comments (Suhas Daftuar)
Pull request description:
This uses the `CNode::ConnectionTypeAsString()` strings in place of the all-caps enums in a couple of comments in `net_processing`, as suggested by ajtowns in https://github.com/bitcoin/bitcoin/pull/19858#discussion_r540821050.
ACKs for top commit:
practicalswift:
ACK 0c41c10830
jnewbery:
ACK 0c41c10830
laanwj:
ACK 0c41c10830
Tree-SHA512: c8ab905e151ebb144c3f878277dc59d77591e4b39632658407b69b80b80d65825d5a391b01e2aea6af2fdf174c143dfe7d2f3eba84a020a58d7926458fdcd0a5