in v0.12 https://github.com/bitcoin/bitcoin/pull/7081 (by @luke-jr) was merged adding `-bytespersigop` (with default of 20).

this is preventing simple bare multisig transactions from being accepted into mempool when the size is < 400 bytes.  
eg; https://gist.github.com/rubensayshi/ac4f617207f7a50559e85d61c05800be

from 1-of-7 and onwards they are accepted because the ratio of bytes:sigops is high enough.  
also having 2 or more inputs will work because it again tips the ratio of bytes:sigops over.

the reason mainly being that `GetLegacySigOpCount` calls `GetSigOpCount` with `fAccurate=false`.

It looks like changing `GetLegacySigOpCount` to use `fAccurate=true` would cause side effects in the few other places (`ConnectBlock`, `CheckBlock`, `CreateNewBlock`) and simply adding `fAccurate` as arg to `GetLegacySigOpCount` would affect the value stored in `CTxMemPoolEntry.sigOpCount` which in turn affects a bunch of other things.

if (GetBoolArg("-salvagewallet", false)) {
        
        if (SoftSetBoolArg("-rescan", true))
            LogPrintf("%s: parameter interaction: -salvagewallet=1 -> setting -rescan=1\n", __func__);
    }
    
    if (GetBoolArg("-zapwallettxes", false)) {
        if (SoftSetBoolArg("-rescan", true))
            LogPrintf("%s: parameter interaction: -zapwallettxes=<mode> -> setting -rescan=1\n", __func__);
    }
    
    if (GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY)) {
        if (SoftSetBoolArg("-whitelistrelay", false))
            LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -whitelistrelay=0\n", __func__);
#ifdef ENABLE_WALLET
        if (SoftSetBoolArg("-walletbroadcast", false))
            LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -walletbroadcast=0\n", __func__);
#endif
    }
    
    if (GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) {
        if (SoftSetBoolArg("-whitelistrelay", true))
            LogPrintf("%s: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1\n", __func__);
    }
}
static std::string ResolveErrMsg(const char * const optname, const std::string& strBind)
{
    return strprintf(_("Cannot resolve -%s address: '%s'"), optname, strBind);
}
void InitLogging()