fix: move SSL params classes to standalone header to resolve circular includes

Servers_SslParams, MySQLServers_SslParams, and PgSQLServers_SslParams
are now in Servers_SslParams.h with minimal dependencies (<string> only).
This avoids the circular include issue between cpp.h, mysql_connection.h,
and Base_HostGroups_Manager.h that caused incomplete type errors.

include/Base_HostGroups_Manager.h

@@ -450,74 +450,6 @@ class AWS_Aurora_Info {
 	~AWS_Aurora_Info();
 };
 
-class Servers_SslParams {
-	public:
-	string hostname;
-	int port;
-	string username;
-	string ssl_ca;
-	string ssl_cert;
-	string ssl_key;
-	string ssl_capath;
-	string ssl_crl;
-	string ssl_crlpath;
-	string ssl_cipher;
-	string tls_version;
-	string comment;
-	string MapKey;
-	Servers_SslParams(string _h, int _p, string _u,
-		string ca, string cert, string key, string capath,
-		string crl, string crlpath, string cipher, string tls,
-		string c) {
-		hostname = _h;
-		port = _p;
-		username = _u;
-		ssl_ca = ca;
-		ssl_cert = cert;
-		ssl_key = key;
-		ssl_capath = capath;
-		ssl_crl = crl;
-		ssl_crlpath = crlpath;
-		ssl_cipher = cipher;
-		tls_version = tls;
-		comment = c;
-		MapKey = "";
-	}
-	Servers_SslParams(char * _h, int _p, char * _u,
-		char * ca, char * cert, char * key, char * capath,
-		char * crl, char * crlpath, char * cipher, char * tls,
-		char * c) {
-		hostname = string(_h);
-		port = _p;
-		username = string(_u);
-		ssl_ca = string(ca);
-		ssl_cert = string(cert);
-		ssl_key = string(key);
-		ssl_capath = string(capath);
-		ssl_crl = string(crl);
-		ssl_crlpath = string(crlpath);
-		ssl_cipher = string(cipher);
-		tls_version = string(tls);
-		comment = string(c);
-		MapKey = "";
-	}
-	Servers_SslParams(string _h, int _p, string _u) {
-		Servers_SslParams(_h, _p, _u, "", "", "", "", "", "", "", "", "");
-	}
-	virtual ~Servers_SslParams() = default;
-	string getMapKey(const char *del) {
-		if (MapKey == "") {
-			MapKey = hostname + string(del) + to_string(port) + string(del) + username;
-		}
-		return MapKey;
-	}
-};
-
-class MySQLServers_SslParams : public Servers_SslParams {
-	public:
-	using Servers_SslParams::Servers_SslParams;
-};
-
 struct p_hg_counter {
 	enum metric {
 		servers_table_version = 0,

include/MySQL_HostGroups_Manager.h

@@ -360,11 +360,6 @@ class AWS_Aurora_Info {
 	~AWS_Aurora_Info();
 };
 
-class MySQLServers_SslParams : public Servers_SslParams {
-	public:
-	using Servers_SslParams::Servers_SslParams;
-};
-
 struct p_hg_counter {
 	enum metric {
 		servers_table_version = 0,

include/PgSQL_HostGroups_Manager.h

@@ -173,11 +173,6 @@ class PgSQL_SrvConnList {
 	PgSQL_Connection *index(unsigned int);
 };
 
-class PgSQLServers_SslParams : public Servers_SslParams {
-	public:
-	using Servers_SslParams::Servers_SslParams;
-};
-
 class PgSQL_SrvC {	// MySQL Server Container
 	public:
 	PgSQL_HGC *myhgc;

include/Servers_SslParams.h

@@ -0,0 +1,82 @@
+#ifndef __CLASS_SERVERS_SSL_PARAMS_H
+#define __CLASS_SERVERS_SSL_PARAMS_H
+
+#include <string>
+
+using std::string;
+using std::to_string;
+
+class Servers_SslParams {
+	public:
+	string hostname;
+	int port;
+	string username;
+	string ssl_ca;
+	string ssl_cert;
+	string ssl_key;
+	string ssl_capath;
+	string ssl_crl;
+	string ssl_crlpath;
+	string ssl_cipher;
+	string tls_version;
+	string comment;
+	string MapKey;
+	Servers_SslParams(string _h, int _p, string _u,
+		string ca, string cert, string key, string capath,
+		string crl, string crlpath, string cipher, string tls,
+		string c) {
+		hostname = _h;
+		port = _p;
+		username = _u;
+		ssl_ca = ca;
+		ssl_cert = cert;
+		ssl_key = key;
+		ssl_capath = capath;
+		ssl_crl = crl;
+		ssl_crlpath = crlpath;
+		ssl_cipher = cipher;
+		tls_version = tls;
+		comment = c;
+		MapKey = "";
+	}
+	Servers_SslParams(char * _h, int _p, char * _u,
+		char * ca, char * cert, char * key, char * capath,
+		char * crl, char * crlpath, char * cipher, char * tls,
+		char * c) {
+		hostname = string(_h);
+		port = _p;
+		username = string(_u);
+		ssl_ca = string(ca);
+		ssl_cert = string(cert);
+		ssl_key = string(key);
+		ssl_capath = string(capath);
+		ssl_crl = string(crl);
+		ssl_crlpath = string(crlpath);
+		ssl_cipher = string(cipher);
+		tls_version = string(tls);
+		comment = string(c);
+		MapKey = "";
+	}
+	Servers_SslParams(string _h, int _p, string _u) {
+		Servers_SslParams(_h, _p, _u, "", "", "", "", "", "", "", "", "");
+	}
+	virtual ~Servers_SslParams() = default;
+	string getMapKey(const char *del) {
+		if (MapKey == "") {
+			MapKey = hostname + string(del) + to_string(port) + string(del) + username;
+		}
+		return MapKey;
+	}
+};
+
+class MySQLServers_SslParams : public Servers_SslParams {
+	public:
+	using Servers_SslParams::Servers_SslParams;
+};
+
+class PgSQLServers_SslParams : public Servers_SslParams {
+	public:
+	using Servers_SslParams::Servers_SslParams;
+};
+
+#endif // __CLASS_SERVERS_SSL_PARAMS_H

include/mysql_connection.h

@@ -26,7 +26,7 @@
 #define STATUS_MYSQL_CONNECTION_HAS_SAVEPOINT        0x00000800
 #define STATUS_MYSQL_CONNECTION_HAS_WARNINGS         0x00001000
 
-class MySQLServers_SslParams;
+#include "Servers_SslParams.h"
 
 class Variable {
 public: