Error message refactoring

Take some untranslatable things out of the message and replace by
format placeholders, to reduce translatable strings and reduce
translation mistakes.

src/bin/pg_basebackup/pg_basebackup.c

@@ -2505,7 +2505,8 @@ main(int argc, char **argv)
 
 		if (no_slot)
 		{
-			pg_log_error("--create-slot and --no-slot are incompatible options");
+			pg_log_error("%s and %s are incompatible options",
+						 "--create-slot", "--no-slot");
 			fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
 					progname);
 			exit(1);
@@ -2543,7 +2544,8 @@ main(int argc, char **argv)
 
 	if (showprogress && !estimatesize)
 	{
-		pg_log_error("--progress and --no-estimate-size are incompatible options");
+		pg_log_error("%s and %s are incompatible options",
+					 "--progress", "--no-estimate-size");
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
 				progname);
 		exit(1);
@@ -2551,7 +2553,8 @@ main(int argc, char **argv)
 
 	if (!manifest && manifest_checksums != NULL)
 	{
-		pg_log_error("--no-manifest and --manifest-checksums are incompatible options");
+		pg_log_error("%s and %s are incompatible options",
+					 "--no-manifest", "--manifest-checksums");
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
 				progname);
 		exit(1);
@@ -2559,7 +2562,8 @@ main(int argc, char **argv)
 
 	if (!manifest && manifest_force_encode)
 	{
-		pg_log_error("--no-manifest and --manifest-force-encode are incompatible options");
+		pg_log_error("%s and %s are incompatible options",
+					 "--no-manifest", "--manifest-force-encode");
 		fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
 				progname);
 		exit(1);

src/interfaces/libpq/fe-connect.c

@@ -1240,8 +1240,8 @@ connectOptions2(PGconn *conn)
 		{
 			conn->status = CONNECTION_BAD;
 			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid channel_binding value: \"%s\"\n"),
-							  conn->channel_binding);
+							  libpq_gettext("invalid %s value: \"%s\"\n"),
+							  "channel_binding", conn->channel_binding);
 			return false;
 		}
 	}
@@ -1266,8 +1266,8 @@ connectOptions2(PGconn *conn)
 		{
 			conn->status = CONNECTION_BAD;
 			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid sslmode value: \"%s\"\n"),
-							  conn->sslmode);
+							  libpq_gettext("invalid %s value: \"%s\"\n"),
+							  "sslmode", conn->sslmode);
 			return false;
 		}
 
@@ -1308,7 +1308,8 @@ connectOptions2(PGconn *conn)
 	{
 		conn->status = CONNECTION_BAD;
 		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("invalid ssl_min_protocol_version value: \"%s\"\n"),
+						  libpq_gettext("invalid %s value: \"%s\"\n"),
+						  "ssl_min_protocol_version",
 						  conn->ssl_min_protocol_version);
 		return false;
 	}
@@ -1316,7 +1317,8 @@ connectOptions2(PGconn *conn)
 	{
 		conn->status = CONNECTION_BAD;
 		printfPQExpBuffer(&conn->errorMessage,
-						  libpq_gettext("invalid ssl_max_protocol_version value: \"%s\"\n"),
+						  libpq_gettext("invalid %s value: \"%s\"\n"),
+						  "ssl_max_protocol_version",
 						  conn->ssl_max_protocol_version);
 		return false;
 	}
@@ -1348,7 +1350,8 @@ connectOptions2(PGconn *conn)
 		{
 			conn->status = CONNECTION_BAD;
 			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid gssencmode value: \"%s\"\n"),
+							  libpq_gettext("invalid %s value: \"%s\"\n"),
+							  "gssencmode",
 							  conn->gssencmode);
 			return false;
 		}
@@ -1392,7 +1395,8 @@ connectOptions2(PGconn *conn)
 		{
 			conn->status = CONNECTION_BAD;
 			printfPQExpBuffer(&conn->errorMessage,
-							  libpq_gettext("invalid target_session_attrs value: \"%s\"\n"),
+							  libpq_gettext("invalid %s value: \"%s\"\n"),
+							  "target_settion_attrs",
 							  conn->target_session_attrs);
 			return false;
 		}