Update manpages and auto-completion

doc/man/restic-cache.1

@@ -53,6 +53,10 @@ The "cache" command allows listing and cleaning local cache directories.
 \fB\-\-json\fP[=false]
     set output mode to JSON for commands that support it
 
+.PP
+\fB\-\-key\-hint\fP=""
+    key ID of key to try decrypting first (default: $RESTIC\_KEY\_HINT)
+
 .PP
 \fB\-\-limit\-download\fP=0
     limits downloads to a maximum rate in KiB/s. (default: unlimited)
@@ -73,6 +77,10 @@ The "cache" command allows listing and cleaning local cache directories.
 \fB\-o\fP, \fB\-\-option\fP=[]
     set extended option (\fB\fCkey=value\fR, can be specified multiple times)
 
+.PP
+\fB\-\-password\-command\fP=""
+    specify a shell command to obtain a password (default: $RESTIC\_PASSWORD\_COMMAND)
+
 .PP
 \fB\-p\fP, \fB\-\-password\-file\fP=""
     read the repository password from a file (default: $RESTIC\_PASSWORD\_FILE)