Adding source table information for the local ntrip caster

[Stefal]

Should fix #183

example:

SOURCETABLE 200 OK
Server: RTKLIB 2.4.3 b34
Date: 2022/11/08 21:09:47 UTC
Connection: close
Content-Type: text/plain
Content-Length: 230

STR;DEV;DEV;rtcm3;1004,1005(10),1006,1008(10),1012,1019,1020,1033(10),1042,1045,1046,1077,1087,1097,1107,1127,1230;2;GPS+GLO+GAL+BDS+QZS;NONE;NONE;47.0983869;-1.2655108;0;0;RTKBase_U-blox_ZED-F9P,2.3.5;NONE;B;N;;
ENDSOURCETABLE

There is one thing I didn't succeeded : Having white space in the generator column. Each time I try this, the argument sent to str2str are not split as it should.