- update change "uptime" column name to "age" per suggestion by 0xB10C (Timo)
- add an additional digit to mping field width
- change m_networks_size from size_t to uint8_t, as size_t was a holdover from m_networks_size being defined as size_t m_networks.size() in a draft
- order Peer struct members by decreasing memory size
This is a backport of core#20115 [1/4]
https://github.com/bitcoin/bitcoin/pull/20115/commits/f8a1c4d9469cb496fdafaf6f4d94977687df9190