this diff adds an EXIT STATUS section to syspatch man page.

syspatch exit with 1 on errors and 2 if syspatch updates itself.

If syspatch does nothing (because no syspatch) or install syspatches
successfully, the exit status is 0 in both case. Should we emphase
on this? I guess « Did syspatch install something? » is a common
question and the exit status can't help.


Index: syspatch.8
===================================================================
RCS file: /cvs/src/usr.sbin/syspatch/syspatch.8,v
retrieving revision 1.20
diff -u -p -r1.20 syspatch.8
--- syspatch.8  15 Jun 2019 16:54:19 -0000      1.20
+++ syspatch.8  19 Jul 2020 22:07:40 -0000
@@ -62,6 +62,8 @@ Directories containing the rollback tarb
 .Xr diff 1
 of installed patches.
 .El
+.Sh EXIT STATUS
+.Ex -std syspatch
 .Sh SEE ALSO
 .Xr signify 1 ,
 .Xr installurl 5 ,

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