* moved .htaccess rules to plain php (index.php)

Its a salut to nginx and other web server nutzer (not apache), as they can now simply redirect all requests with simple rule to index.php, and php will take care of all redirects. .htaccess just now redirects everything to index.php with simple 3 lines.
* change accountmanagement links to use friendly_urls
* fixed creating new forum thread
* some fixes in account changecomment action
* show info when account name/number or password is empty on login
* fixed showing account login errors
* added new twig function getLink that convert link taking into account config.friendly_urls
* internalLayoutLink -> getLink

system/templates/account.create_character.html.twig

@@ -6,7 +6,7 @@ In any case the name must not violate the naming conventions stated in the <a hr
 <b><font color="red"> You have maximum number of characters per account on your account. Delete one before you make new.</font></b>
 {% endif %}
 <br/><br/>
-<form action="?subtopic=accountmanagement&action=createcharacter" method="post">
+<form action="{{ getLink('account/character/create') }}" method="post">
 	<input type="hidden" name=savecharacter value="1">
 	<div class="TableContainer">
 		<table class="Table3" cellpadding="0" cellspacing="0">
@@ -134,7 +134,7 @@ In any case the name must not violate the naming conventions stated in the <a hr
 			</td>
 			<td>
 				<table border="0" cellspacing="0" cellpadding="0">
-					<form action="?subtopic=accountmanagement" method="post">
+					<form action="{{ getLink('account/manage') }}" method="post">
 						<tr>
 							<td style="border:0px;">
 								<div class="BigButton" style="background-image:url({{ template_path }}/images/buttons/sbutton.gif)"><div onMouseOver="MouseOverBigButton(this);" onMouseOut="MouseOutBigButton(this);" ><div class="BigButtonOver" style="background-image:url({{ template_path }}/images/buttons/sbutton_over.gif);" ></div><input class="ButtonText" type="image" name="Back" alt="Back" src="{{ template_path }}/images/buttons/_sbutton_back.gif" ></div></div>