Further header cleanup and a few updates

Updated llstring to current linden
Further linden_common cleanup
Header cleanup
Raised banlines to 5000 as per linden server change
Included missing llmediaentry.cpp file
Minor whitespace changes here and there

indra/llcommon/llstring.cpp

@@ -34,7 +34,6 @@
 
 #include "llstring.h"
 #include "llerror.h"
-#include "llfasttimer.h"
 
 #if LL_WINDOWS
 #define WIN32_LEAN_AND_MEAN
@@ -604,16 +603,10 @@ std::string utf8str_removeCRLF(const std::string& utf8str)
 	}
 	const char CR = 13;
 
-	S32 i = utf8str.find(CR);
-	if(i == std::string::npos)
-		return  utf8str; //Save us from a reserve call.
-
 	std::string out;
 	out.reserve(utf8str.length());
 	const S32 len = (S32)utf8str.length();
-	if(i)
-		out.assign(utf8str,0,i); //Copy previous text to buffer
-	for( ++i; i < len; i++ )
+	for( S32 i = 0; i < len; i++ )
 	{
 		if( utf8str[i] != CR )
 		{