Add LINO_FILE_LOGLEVEL env var for file logging handeler. 
Add LINO_FILE_LOGLEVEL env var for file logging handeler. 


lino-framework/lino,lsaffre/lino,lino-framework/lino,lsaffre/lino,lino-framework/lino,lino-framework/lino,lino-framework/lino,khchine5/lino,lsaffre/lino,khchine5/lino,lsaffre/lino,khchine5/lino,lsaffre/lino,khchine5/lino,khchine5/lino