CUser: Save CIRCSock* instead of looking it up every time

Via profiling ZNC it was found that much CPU time was spent inside FindSockByName()
which in turn was called by CUser::GetIRCSock():

w00t volunteered to write a patch to save that pointer inside CUser and
here is the result. Thanks.


git-svn-id: https://znc.svn.sourceforge.net/svnroot/znc/trunk@1053 726aef4b-f618-498e-8847-2d620e286838

znc.cpp

@@ -100,6 +100,8 @@ bool CZNC::OnBoot() {
 
 bool CZNC::ConnectUser(CUser *pUser) {
 	CString sSockName = "IRC::" + pUser->GetUserName();
+	// Don't use pUser->GetIRCSock(), as that only returns something if the
+	// CIRCSock is already connected, not when it's still connecting!
 	CIRCSock* pIRCSock = (CIRCSock*) m_Manager.FindSockByName(sSockName);
 
 	if (m_pISpoofLockFile != NULL) {