MVP feature :: TCP scanning about netbang HOT 7 CLOSED

#3 depends on TCP scanning to be moved into its own func.

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tcpScan barebones is complete and implemented in main(); tested on tcp_test_win portlist on localhost; output nominal:

PS C:\Users\geigner\workbench\dev\golang\netscanx> go run ./main.go
Success
Error: [dial tcp 127.0.0.1:137: connectex: An attempt was made to access a socket in a way forbidden by its access permissions.]
Error: [dial tcp 127.0.0.1:139: connectex: No connection could be made because the target machine actively refused it.]
Success
Success
Success
Success
Success
Error: [dial tcp 127.0.0.1:8000: connectex: No connection could be made because the target machine actively refused it.]
Error: [dial tcp 127.0.0.1:9999: connectex: No connection could be made because the target machine actively refused it.]

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TCP Connection, 3-way handshake(FULL) barebones done. See var conn *Conn

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New spec: need tcpScan() to use only a single arg to accommodat channel broker.

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blocker for #3 resolved: tcpScan() uses single arg

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12/12 status. Done so far:
TCP connect
TCP full-open
TCP close
TCP connection error collection/handling
TCP session error collection/handling
Response collection

still need:
TCP half open

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moving TCP half-open scanning to feature: "special packet flags constructor". TCP scanning is implemented

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