Allow underscore _ in the host name of a postgres database

[OlgaZittau]

Class com.impossibl.postgres.jdbc.ConnectionUtil parses the URLs to connect to a Postgres database. The URL_PATTERN does not allow an unserscore '_' in the host name - although the underscore is a valid character in host names.
Could you fix this?
Thank you very much
Olga

[FrostbittenKing]

Nope, according to https://kb.iu.edu/d/afqs#:~:text=The%20underscore%20is%20not%20a,the%20hostname%20is%20case%20insensitive.
/ rfc822
underscore is not a valid character.
I had this discussion with our infrastructure guys, cause we ran into this issue in a cloud environment.
Not allowing is, on the other hand another can of worms. Cause for infrastructure, underscore is a convenient character / separator for autogenerated urls inside an infrastructure environment. Which is the reason, they had to assign us manually another hostname, that is valid according to pgjdbc-ng.