Update manpages and auto-completion

doc/man/restic-diff.1

@@ -28,18 +28,27 @@ U  The metadata (access mode, timestamps, ...) for the item was updated
 M  The file's content was modified
 .IP \(bu 2
 T  The type was changed, e.g. a file was made a symlink
+.IP \(bu 2
+?  Bitrot detected: The file's content has changed but all metadata is the same
 
 .RE
 
+.PP
+Metadata comparison will likely not work if a backup was created using the
+\&'--ignore-inode' or '--ignore-ctime' option.
+
 .PP
 To only compare files in specific subfolders, you can use the
-":" syntax, where "subfolder" is a path within the
+"snapshotID:subfolder" syntax, where "subfolder" is a path within the
 snapshot.
 
 
 .SH EXIT STATUS
 .PP
-Exit status is 0 if the command was successful, and non-zero if there was any error.
+Exit status is 0 if the command was successful.
+Exit status is 1 if there was any error.
+Exit status is 10 if the repository does not exist.
+Exit status is 11 if the repository is already locked.
 
 
 .SH OPTIONS
@@ -69,6 +78,14 @@ Exit status is 0 if the command was successful, and non-zero if there was any er
 \fB--compression\fP=auto
 	compression mode (only available for repository format version 2), one of (auto|off|max) (default: $RESTIC_COMPRESSION)
 
+.PP
+\fB--http-user-agent\fP=""
+	set a http user agent for outgoing http requests
+
+.PP
+\fB--insecure-no-password\fP[=false]
+	use an empty password for the repository, must be passed to every restic command (insecure)
+
 .PP
 \fB--insecure-tls\fP[=false]
 	skip TLS certificate verification when connecting to the repository (insecure)