Add function to parse pi number from hostname

Change-Id: Ie3f01d98e368816a3e58abe3d7639d4243a44012
diff --git a/aos/network/team_number.h b/aos/network/team_number.h
index 618affb..91a61f9 100644
--- a/aos/network/team_number.h
+++ b/aos/network/team_number.h
@@ -24,10 +24,14 @@
 // Guaranteed to be safe to call during static initialization time.
 void OverrideTeamNumber(uint16_t team);
 
+// Returns the pi number for a pi formated hostname.  pi-team#-pi# (pi-971-5)
+std::optional<uint16_t> ParsePiNumber(const std::string &hostname);
+
 namespace team_number_internal {
 
 std::optional<uint16_t> ParseRoborioTeamNumber(const std::string &hostname);
 
+// Returns the team number for a pi formated hostname.  pi-team#-pi#
 std::optional<uint16_t> ParsePiTeamNumber(const std::string &hostname);
 
 }  // namespace team_number_internal