Remove some code duplications and move functions into classes

This removes ReadFile(), WriteFile(), ReadLine(), Lower() and Upper() from
Utils.h and adds CFile::ReadFile().

The biggest part of this patch fixes modules to use CFile and CString instead
of these global functions.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1311 726aef4b-f618-498e-8847-2d620e286838

FileUtils.h

@@ -112,6 +112,7 @@ public:
 	bool Open(int iFlags, mode_t iMode = 0644);
 	int Read(char *pszBuffer, int iBytes);
 	bool ReadLine(CString & sData, const CString & sDelimiter = "\n");
+	bool ReadFile(CString& sData, size_t iMaxSize = 512 * 1024);
 	int Write(const char *pszBuffer, u_int iBytes);
 	int Write(const CString & sData);
 	void Close();