* Only allow IPv4 literals in strict form
The strict form as defined in RFC 6943, section 3.1.1 only allows the dotted
form ddd.ddd.ddd.ddd of IPv4 literals, where ddd is a one to three digit decimal
number between 0 and 255. Until now octal numbers (with a leading zero) were
interpreted as decimal numbers which has security implications, see
CVE-2021-29922 and CVE-2021-29923.
* Update lib/pure/net.nim
Co-authored-by: Dominik Picheta <dominikpicheta@googlemail.com>
