Important Updates:

- DataTreeCore:
  - Allow types float, int & bool to be read as strings with GetStr()
- LogCore:
  - Add comments to Logging parameters
- WatchDogCore:
  - Call CSelectableCore::Process() in Process() to manage connect
- SelectableCore:
  - Allow SetSocketHandle() to be called if Handle already set as socket
  - added strlcase() method to convert string to lower case
  - Update Handle structure:
    - renamed Address -> HostName
    - renamed PortNo -> PortName
    - added AddressList for all resolved addresses
    - added AddressInfo for active address
  - Add ResolveAddress() method
    - Domain name and protocol port resolving with GetAddrInfo()
  - JSON updated:
    - domain name can be provided instead of IP address
    - protocol can be specified instead of Port No, e.g. "HTTP" / "SSH"
  - Resolve address before connect, or use next resolved address

SelectableCore.h

@@ -87,9 +87,11 @@ struct SHandle {
 
     pid_t       ChildPID;  // Forked child PID
 
-    char        * Address; // Socket IP address
-    int         PortNo;    // Socket port no
-    bool        KeepAlive; // Socket keep alive
+    char            * HostName;     // Host name or IP adddress
+    char            * PortName;     // Socket port no or protocol, e.g. "80" or "HTTP"
+    struct addrinfo * AddressList;  // List of resolved IP Addresses for host name
+    struct addrinfo * AddressInfo;  // Current selected IP Address
+    bool            KeepAlive;      // Socket keep alive
 
     // Buffers
     CRollingBuffer  * InBuffer;
@@ -194,6 +196,7 @@ protected:
     virtual int  OpenForkPipe( THandle * Handle );
 
     // Socket Operations
+    bool         ResolveAddress( THandle * Handle );
     virtual int  OpenServerSocket( THandle * Handle );
     virtual int  OpenRemoteClientSocket( THandle * Handle );
     virtual int  OpenClientSocket( THandle * Handle );
@@ -208,6 +211,13 @@ protected:
     // Specific operations
     bool BuildArgs( const char * ExecPath, int &Count, char * Args[] );
 
+    // Convert string to lower case
+    inline char *  strlcase( char * Str ) {
+        for (char * Ch = Str; *Ch; Ch++ )
+            *Ch = tolower(*Ch);
+        return Str;
+    }
+
 public:
     // Life Cycle
     CSelectableCore( const char * Name, const char * pType = "Selectable" );
@@ -240,7 +250,7 @@ public:
     // File Interface
     bool    SetPortHandle( THandle * Handle, const char * FileName );
     bool    SetForkPipeHandle( THandle * Handle, const char * ExecPath );
-    bool    SetSocketHandle( THandle * Handle, EConnectType Type, const char * Address, const int PortNo, bool KeepAlive );
+    bool    SetSocketHandle( THandle * Handle, EConnectType Type, const char * HostName, const char * PortName, bool KeepAlive );
     bool    ClearHandle( THandle * Handle );
 
     // FD Operations