Add reseed.threshold option

Config.cpp

@@ -165,6 +165,7 @@ namespace config {
 	options_description reseed("Reseed options");	
 	reseed.add_options()
 	  ("reseed.verify", value<bool>()->default_value(false), "Verify .su3 signature")
+	  ("reseed.threshold", value<uint16_t>()->default_value(25), "Minimum number of known routers before requesting reseed")
 		("reseed.floodfill", value<std::string>()->default_value(""), "Path to router info of floodfill to reseed from")
 	  ("reseed.file", value<std::string>()->default_value(""),  "Path to local .su3 file or HTTPS URL to reseed from")
 	  ("reseed.zipfile", value<std::string>()->default_value(""),  "Path to local .zip file to reseed from")

NetDb.cpp

@@ -41,7 +41,9 @@ namespace data
 		InitProfilesStorage ();
 		m_Families.LoadCertificates ();
 		Load ();
-		if (m_RouterInfos.size () < 25) // reseed if # of router less than 50
+
+                uint16_t threshold; i2p::config::GetOption("reseed.threshold", threshold);
+		if (m_RouterInfos.size () < threshold) // reseed if # of router less than threshold
 			Reseed ();
 
 		m_IsRunning = true;