doc for config module moved from wiki

common/utils/telnetsrv/DOC/telnethelp.md

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+# oai telnet server global help
+
+``` bash
+alblf@at8020-a:~$ telnet 10.133.10.77 9090
+Trying 10.133.10.77...
+Connected to 10.133.10.77.
+Escape character is '^]'.
+
+softmodem> help
+   module 0 = telnet:
+      telnet [get set] debug <value>
+      telnet [get set] prio <value>
+      telnet [get set] loopc <value>
+      telnet [get set] loopd <value>
+      telnet [get set] phypb <value>
+      telnet [get set] hsize <value>
+      telnet [get set] hfile <value>
+      telnet redirlog [here,file,off]
+      telnet param [prio]
+      telnet history [list,reset]
+   module 1 = softmodem:
+      softmodem show loglvl|thread|config
+      softmodem log (enter help for details)
+      softmodem thread (enter help for details)
+      softmodem exit 
+   module 2 = phy:
+      phy disp [phycnt,uedump,uestat UE<x>]
+   module 3 = loader:
+      loader [get set] mainversion <value>
+      loader [get set] defpath <value>
+      loader [get set] maxshlibs <value>
+      loader [get set] numshlibs <value>
+      loader show [params,modules]
+   module 4 = coding:
+      coding [get set] maxiter <value>
+      coding mode [sse,avx2,stdc,none]
+softmodem> 
+```  
+
+# oai telnet server, specific commands help  
+
+``` bash
+softmodem> softmodem log help
+ log sub commands: 
+ show:  		     display current log configuration 
+ online, noonline:	     enable or disable console logs 
+ enable, disable id1-id2:    enable or disable logs for components index id1 to id2 
+ level_<level> id1-id2:      set log level to <level> for components index id1 to id2 
+ level_<verbosity> id1-id2:  set log verbosity to <verbosity> for components index id1 to id2 
+use the show command to get the values for <level>, <verbosity> and the list of component indexes that can be used for id1 and id2 
+softmodem>
+
+
+```
+
+[oai telnetserver home](telnetsrv)  
+[oai telnetserver usage home](telnetusage)