Note that the torrc format doesn't need nl at end

parse_config_line_from_str(const char *line, char **key_out, char **value_out)

{

  /* I believe the file format here is supposed to be:

     FILE = (EMPTYLINE | LINE)*

     FILE = (EMPTYLINE | LINE)* (EMPTYLASTLINE | LASTLINE)?

     EMPTYLINE = SPACE* NL | COMMENT NL

     EMPTYLASTLINE = SPACE* | COMMENT

     EMPTYLINE = EMPTYLASTLINE NL

     SPACE = ' ' | '\r' | '\t'

     COMMENT = '#' NOT-NL*

     NOT-NL = Any character except '\n'

     NL = '\n'

     LINE = SPACE* KEY SPACE* VALUES NL

     LASTLINE = SPACE* KEY SPACE* VALUES

     LINE = LASTLINE NL

     KEY = KEYCHAR+

     KEYCHAR = Any character except ' ', '\r', '\n', '\t', '#', "\"