man pages (section 1): document exit status

Document it so it can be relied upon in scripts.

sfeed.1

@@ -1,4 +1,4 @@
-.Dd May 2, 2019
+.Dd March 15, 2020
 .Dt SFEED 1
 .Os
 .Sh NAME
@@ -47,6 +47,8 @@ Item author.
 .It enclosure
 Item, first enclosure.
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed_plain 1 ,
 .Xr sfeed 5

sfeed_atom.1

@@ -1,4 +1,4 @@
-.Dd July 20, 2019
+.Dd March 15, 2020
 .Dt SFEED_ATOM 1
 .Os
 .Sh NAME
@@ -30,6 +30,8 @@ is reading from one or more
 .Ar file
 it will prefix the entry title with the feed name which is the basename of the
 input file.
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed_plain 1 ,

sfeed_frames.1

@@ -1,4 +1,4 @@
-.Dd July 20, 2019
+.Dd March 15, 2020
 .Dt SFEED_FRAMES 1
 .Os
 .Sh NAME
@@ -32,6 +32,8 @@ The items frame contains all the item HTML links to the remote content.
 The menu frame which contains navigation "anchor" links to the feed names in
 items.html.
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed_html 1 ,

sfeed_gopher.1

@@ -1,4 +1,4 @@
-.Dd January 22, 2020
+.Dd March 15, 2020
 .Dt SFEED_GOPHER 1
 .Os
 .Sh NAME
@@ -44,6 +44,8 @@ The default is "127.0.0.1".
 This environment variable can be used as the Gopher Port field.
 The default is "70".
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed 5

sfeed_html.1

@@ -1,4 +1,4 @@
-.Dd January 22, 2020
+.Dd March 15, 2020
 .Dt SFEED_HTML 1
 .Os
 .Sh NAME
@@ -26,6 +26,8 @@ is empty.
 .Pp
 Items with a timestamp from the last day compared to the system time at the
 time of formatting are counted and marked as new.
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed_frames 1 ,

sfeed_mbox.1

@@ -1,4 +1,4 @@
-.Dd July 20, 2019
+.Dd March 15, 2020
 .Dt SFEED_MBOX 1
 .Os
 .Sh NAME
@@ -35,6 +35,8 @@ To make further filtering simpler some custom headers are set:
 .It X-Feedname
 The feedname (as set in sfeedrc).
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr fdm 1 ,
 .Xr procmail 1 ,

sfeed_opml_export.1

@@ -1,4 +1,4 @@
-.Dd December 25, 2014
+.Dd March 15, 2020
 .Dt SFEED_OPML_EXPORT 1
 .Os
 .Sh NAME
@@ -22,6 +22,8 @@ see the
 .Sx FILES READ
 section for more information.
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed_update 1 ,
 .Xr sfeedrc 5

sfeed_opml_import.1

@@ -1,4 +1,4 @@
-.Dd December 25, 2014
+.Dd March 15, 2020
 .Dt SFEED_OPML_IMPORT 1
 .Os
 .Sh NAME
@@ -9,6 +9,8 @@
 .Sh DESCRIPTION
 .Nm
 reads the OPML XML data from stdin and writes the config file text to stdout.
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed_update 1 ,
 .Xr sfeedrc 5

sfeed_plain.1

@@ -1,4 +1,4 @@
-.Dd July 20, 2019
+.Dd March 15, 2020
 .Dt SFEED_PLAIN 1
 .Os
 .Sh NAME
@@ -38,6 +38,8 @@ per rune, using
 .Xr mbtowc 3
 and
 .Xr wcwidth 3 .
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed_html 1 ,

sfeed_twtxt.1

@@ -1,4 +1,4 @@
-.Dd July 20, 2019
+.Dd March 15, 2020
 .Dt SFEED_TWTXT 1
 .Os
 .Sh NAME
@@ -23,6 +23,8 @@ If no
 .Ar file
 parameters are specified and so the data is read from stdin the feed name
 is empty.
+.Sh EXIT STATUS
+.Ex -std
 .Sh SEE ALSO
 .Xr sfeed 1 ,
 .Xr sfeed_plain 1 ,

sfeed_update.1

@@ -1,4 +1,4 @@
-.Dd February 4, 2020
+.Dd March 15, 2020
 .Dt SFEED_UPDATE 1
 .Os
 .Sh NAME
@@ -44,6 +44,8 @@ The
 script merges new items with this file.
 The feedname cannot contain '/' characters, they will be replaced with '_'.
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh EXAMPLES
 To update your feeds and format them in various formats:
 .Bd -literal

sfeed_web.1

@@ -1,4 +1,4 @@
-.Dd December 13, 2017
+.Dd March 15, 2020
 .Dt SFEED_WEB 1
 .Os
 .Sh NAME
@@ -31,6 +31,8 @@ option is specified then it is printed as is.
 .It content\-type
 Usually application/atom+xml or application/rss+xml.
 .El
+.Sh EXIT STATUS
+.Ex -std
 .Sh EXAMPLES
 Get urls from xkcd website:
 .Bd -literal

sfeed_xmlenc.1

@@ -1,4 +1,4 @@
-.Dd December 2, 2018
+.Dd March 15, 2020
 .Dt SFEED_XMLENC 1
 .Os
 .Sh NAME
@@ -10,6 +10,8 @@
 .Nm
 reads XML data from stdin and writes the found text\-encoding to stdout.
 It translates the characters to lowercase and strips control characters.
+.Sh EXIT STATUS
+.Ex -std
 .Sh EXAMPLES
 Get text\-encoding from xkcd Atom feed:
 .Bd -literal