Fix mysql_setpermission hostname logic

Changes:
- Don't include port in connection parameters with 'localhost' hostname

More info:
The hostname, if not specified or specified as '' or 'localhost', will default
to a MySQL server running on the local machine using the default for the UNIX socket.
To connect to a MySQL server on the local machine via TCP, you must specify the
loopback IP address (127.0.0.1) as the host.

Reported issue: https://bugzilla.redhat.com/show_bug.cgi?id=1976224

scripts/mysql_setpermission.sh

@@ -52,6 +52,7 @@ use strict;
 use vars qw($dbh $sth $hostname $opt_user $opt_password $opt_help $opt_host
 	    $opt_socket $opt_port $host $version);
 
+my $sqlport = "";
 my $sqlhost = "";
 my $user = "";
 
@@ -84,9 +85,13 @@ if ($opt_password eq '')
   print "\n";
 }
 
+# Using port argument with 'localhost' will cause an error
+if ($sqlhost ne "localhost") {
+  $sqlport = ":port=$opt_port";
+}
 
 # make the connection to MariaDB
-$dbh= DBI->connect("DBI:mysql:mysql:host=$sqlhost:port=$opt_port:mysql_socket=$opt_socket",$opt_user,$opt_password, {PrintError => 0}) ||
+$dbh= DBI->connect("DBI:mysql:mysql:host=$sqlhost$sqlport:mysql_socket=$opt_socket",$opt_user,$opt_password, {PrintError => 0}) ||
   die("Can't make a connection to the mysql server.\n The error: $DBI::errstr");
 
 # the start of the program