Clarify manpage: seccomp is disabled for the time being (#917930)

debian/patches/local.manpage-seccomp-is-disabled.patch

@@ -0,0 +1,18 @@
+Subject: Clarify manpage: seccomp is disabled for the time being
+Author: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
+Date: 2019-01-11
+Bug-Debian: https://bugs.debian.org/917930
+
+--- a/doc/file.man
++++ b/doc/file.man
+@@ -366,6 +366,10 @@
+ i.e. when the
+ .Fl z
+ flag is specified and the built-in decompressors are not available.
++.Pp
++.Em Note:
++This Debian version of file was built without seccomp support, so this option
++has no effect.
+ .It Fl v , Fl Fl version
+ Print the version of the program and exit.
+ .It Fl z , Fl Fl uncompress

debian/patches/series

@@ -10,3 +10,4 @@ local.report-gz-as-application-gzip.patch
 local.disable-detection-of-vax-coff-executables.patch
 local.disable-algol68-detection.patch
 local.extra-magic.patch
+local.manpage-seccomp-is-disabled.patch