Configurable corrupt error recommendations (#52)

mdbx/error.go

@@ -76,15 +76,17 @@ const (
 // other values may still be produced.
 const minErrno, maxErrno C.int = C.MDBX_KEYEXIST, C.MDBX_LAST_ADDED_ERRCODE
 
-const hardwareRecommendations = "Likely because hardware failure. Before creating issue please use tools like https://www.memtest86.com to test RAM and tools like https://www.smartmontools.org to test Disk. To handle hardware risks: use ECC RAM, use RAID of disks, run multiple application instances (or do backups). If hardware checks passed - check FS settings - 'fsync' and 'flock' must be enabled. "
-const coredumpRecommendations = "Otherwise - please create issue in Application repo." // with backtrace or coredump. To create coredump set compile option 'MDBX_FORCE_ASSERTIONS=1' and env variable 'GOTRACEBACK=crash'."
-const recoveryRecommendations = "On default DURABLE mode, power outage can't cause this error. On other modes - power outage may break last transaction and mdbx_chk can recover db in this case, see '-t' and '-0|1|2' options."
+// App can re-define this messages from init() func
+var CorruptErrorHardwareRecommendations = "Likely because hardware failure. Before creating issue please use tools like https://www.memtest86.com to test RAM and tools like https://www.smartmontools.org to test Disk. To handle hardware risks: use ECC RAM, use RAID of disks, run multiple application instances (or do backups). If hardware checks passed - check FS settings - 'fsync' and 'flock' must be enabled. "
+var CorruptErrorBacktraceRecommendations = "Otherwise - please create issue in Application repo." // with backtrace or coredump. To create coredump set compile option 'MDBX_FORCE_ASSERTIONS=1' and env variable 'GOTRACEBACK=crash'."
+var CorruptErrorRecoveryRecommendations = "On default DURABLE mode, power outage can't cause this error. On other modes - power outage may break last transaction and mdbx_chk can recover db in this case, see '-t' and '-0|1|2' options."
+var CorruptErrorMessage = CorruptErrorHardwareRecommendations + " " + CorruptErrorBacktraceRecommendations + " " + CorruptErrorRecoveryRecommendations
 
 func (e Errno) Error() string {
 	if e == Corrupted {
-		return "MDBX_CORRUPTED: " + hardwareRecommendations + " " + coredumpRecommendations + " " + recoveryRecommendations
+		return "MDBX_CORRUPTED: " + CorruptErrorMessage
 	} else if e == Panic {
-		return "MDBX_PANIC: " + hardwareRecommendations + " " + coredumpRecommendations + " " + recoveryRecommendations
+		return "MDBX_PANIC: " + CorruptErrorMessage
 	}
 	return C.GoString(C.mdbx_strerror(C.int(e)))
 }