message: das.cli: start migration to using elle.from-string
diff: #include <elle/Error.hh>
  #include <elle/assert.hh>
  #include <elle/find.hh>
  +#include <elle/from-string.hh>
  #include <elle/log.hh>
  #include <elle/make-vector.hh>
  #include <elle/range.hh>
  @@ -365,13 +366,15 @@ namespace elle
  std::enable_if_t<std::is_same<I, bool>::value, I>
  convert(std::string const& v, int) const
  {
  - if (v == "true")
  - return true;
  - else if (v == "false")
  - return false;
  - else
  + try
  + {
  + return elle::from_string<bool>(v);
  + }
  + catch (std::invalid_argument)
  + {
  throw OptionValueError(this->_option, v, "invalid boolean");
  }
  + }
  template <typename I>
  std::enable_if_t<std::is_same<I, std::string>::value, I>
  