Make it possible to quote names in autofs maps using double quotes.

Note that this is a workaround, not a proper solution.  If you know
lex well, and want to help - please let me know, I'll explain how it
should work.

PR:		192968
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation

usr.sbin/autofs/token.l

@@ -48,6 +48,7 @@ extern int	yylex(void);
 %option noyywrap
 
 %%
+\"[^"]+\"		{ yytext++; yytext[strlen(yytext) - 1] = '\0'; return STR; };
 [a-zA-Z0-9\.\+-_/\:\[\]$&{}]+ { return STR; }
 #.*\n			{ lineno++; return NEWLINE; };
 \\\n			{ lineno++; };