Enable "Apply rate limit to peers on LAN" option by default

Because some ISP will deploy Carrier Grade NAT (means assigning private
IP address to user) and thus accidentally circumvent the speed limiter.

https://www.a10networks.com/blog/carrier-grade-nat/

src/base/bittorrent/session.cpp

@@ -399,7 +399,7 @@ Session::Session(QObject *parent)
     , m_slowTorrentsInactivityTimer(BITTORRENT_SESSION_KEY("SlowTorrentsInactivityTimer"), 60)
     , m_outgoingPortsMin(BITTORRENT_SESSION_KEY("OutgoingPortsMin"), 0)
     , m_outgoingPortsMax(BITTORRENT_SESSION_KEY("OutgoingPortsMax"), 0)
-    , m_ignoreLimitsOnLAN(BITTORRENT_SESSION_KEY("IgnoreLimitsOnLAN"), true)
+    , m_ignoreLimitsOnLAN(BITTORRENT_SESSION_KEY("IgnoreLimitsOnLAN"), false)
     , m_includeOverheadInLimits(BITTORRENT_SESSION_KEY("IncludeOverheadInLimits"), false)
     , m_announceIP(BITTORRENT_SESSION_KEY("AnnounceIP"))
     , m_isSuperSeedingEnabled(BITTORRENT_SESSION_KEY("SuperSeedingEnabled"), false)