remove sfeed_tail and recently added security considerations

... both are out-of-scope for sfeed.

- sfeed_tail can be written as some simple customized awk script reading from a
  FIFO. The C version did not work well on FIFO's.
- Security considerations are mentioned in the official HTML spec and applies to
  all HTML and protocol handlers, so is out-of-scope.

1 files changed, 0 insertions, 41 deletions

diff --git a/sfeed_tail.1 b/sfeed_tail.1
deleted file mode 100644
index 955c423..0000000
--- a/sfeed_tail.1
+++ /dev/null
@@ -1,41 +0,0 @@
-.Dd December 14, 2018
-.Dt SFEED_TAIL 1
-.Os
-.Sh NAME
-.Nm sfeed_tail
-.Nd format unseen feed data to a plain-text list
-.Sh SYNOPSIS
-.Nm
-.Ar file...
-.Sh DESCRIPTION
-.Nm
-formats only new and unseen feed data (TSV) from
-one or more
-.Ar file
-to stdout as a plain-text list.
-The basename of the
-.Ar file
-is used as the feed name in the output.
-.Pp
-Unseen items are printed per line in a similar format to
-.Xr sfeed_plain 1 ,
-duplicate items are ignored.
-The list of unique items is determined by the fields: item id, item link and
-UNIX timestamp of the item date.
-.Pp
-.Nm
-will also only process and show items that are considered new: the item
-timestamp is not older than a day ago.
-.Sh IMPLEMENTATION NOTES
-.Nm
-checks for file modifications every 10 seconds by checking the filesize and
-modification time.
-Keep in mind that because
-.Nm
-keeps a list of items it can potentially consume much memory.
-.Sh SEE ALSO
-.Xr sfeed 1 ,
-.Xr sfeed_plain 1 ,
-.Xr tail 1
-.Sh AUTHORS
-.An Hiltjo Posthuma Aq Mt hiltjo@codemadness.org