Function parse_oid 

pub fn parse_oid(s: &str) -> Result<Oid, String>

Parse an OID from string, supporting both dotted notation and well-known names.

Accepts:

• Dotted notation: “1.3.6.1.2.1.1.1.0”
• Well-known names: “sysDescr.0”, “system”, “ifTable”