Fix Pyro work with SSL wrapper (sslpsk)

Following error was shown in Beremiz console:
PYRO connecting to URI : PYROS://127.0.0.1:3001#beremiz
Exception while connecting to 'PYROS://127.0.0.1:3001#beremiz': non-zero flags not allowed in calls to recv() on <class 'ssl.SSLSocket'>
Connection failed to PYROS://127.0.0.1:3001#beremiz!

Reason is that Pyro calls socket recv() with MSGWAITALL flag, that causes ValueError exception.

https://docs.python.org/2/library/ssl.html
recv(), recv_into() (but passing a non-zero flags argument is not allowed)

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#Encoding of BACnet Object Types;;;

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#Code;Object Type;;

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0;Analog Input;;

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1;Analog Output;;

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2;Analog Value;;

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3;Binary Input ;;

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4;Binary Output;;

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5;Binary Value;;

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6;Calendar;;

    10

7;Command;;

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8;Device;;

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9;Event-Enrollment;;

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10;File;;

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11;Group;;

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12;Loop;;

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13;Multistate Input;;

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14;Multistate Output

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15;Notification Class

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16;Program

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17;Schedule

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18;Averaging

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19;Multistate Value

    23

20;Trend Log

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21;Life Safety Point

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22;Life Safety Zone

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23;Accumulator

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24;Pulse Converter