Name
strtobool — 
     convert common user inputs into boolean values
 
Synopsis
| int strtobool ( | const char * s, | 
|  | bool * res ); | 
 
Arguments
- s
- 
     input string
     
- res
- 
     result
     
Description
   This routine returns 0 iff the first character is one of 'Yy1Nn0'.
   Otherwise it will return -EINVAL.  Value pointed to by res is
   updated upon finding a match.