Minor documentation fixes.

The muttrc man page doesn't contain the "Format Strings" section in
the manual, so add a pointer to the explanation of conditionals in
$status_format.

init.h

@@ -1312,7 +1312,7 @@ struct option_t MuttVars[] = {
   ** message to which you are replying.  You are strongly encouraged not to
   ** change this value, as it tends to agitate the more fanatical netizens.
   ** .pp
-  ** The value of this option is ignored if $$text_flowed is set, too because
+  ** The value of this option is ignored if $$text_flowed is set, because
   ** the quoting mechanism is strictly defined for format=flowed.
   ** .pp
   ** This option is a format string, please see the description of
@@ -1329,6 +1329,7 @@ struct option_t MuttVars[] = {
   ** .pp
   ** ``Format strings'' are similar to the strings used in the C
   ** function \fCprintf(3)\fP to format output (see the man page for more details).
+  ** For an explanation of the %? construct, see the $$status_format description.
   ** The following sequences are defined in Mutt:
   ** .dl
   ** .dt %a .dd address of the author