Dropped "-f" format flag for pidof command as it

could be used to print information from memory or crash
pidof. Replaced flag with "-d" which allows for a custom
separator to be used between listed PIDs.
Patch supplied by KatolaZ.

man/pidof.8

@@ -28,8 +28,8 @@ pidof -- find the process ID of a running program.
 .IR omitpid[,omitpid...] ]
 .RB [ \-o
 .IR omitpid[,omitpid...]... ]
-.RB [ \-f
-.IR format ]
+.RB [ \-d
+.IR sep ]
 .B program
 .RB [ program... ]
 .SH DESCRIPTION
@@ -64,15 +64,13 @@ a status of true or false to indicate whether a matching PID was found.
 .IP \-x
 Scripts too - this causes the program to also return process id's of
 shells running the named scripts.
+.IP "-d \fIsep\fP"
+Tells \fIpidof\fP to use \fIsep\fP as an output separator if more than one PID
+is shown. The default separator is a space.
 .IP "-o \fIomitpid\fP"
 Tells \fIpidof\fP to omit processes with that process id. The special
 pid \fB%PPID\fP can be used to name the parent process of the \fIpidof\fP
 program, in other words the calling shell or shell script.
-.IP "-f \fIformat\fP"
-Tells \fIpidof\fP to format the process IDs in the given \fIprintf\fP style string.
-For example \fB" -p%d"\fP is useful for \fIstrace\fP.
-The "%d" symbol is used as a place holder for the PID to be printed. A "\\n" can
-be used to cause a newline to be printed. For example \fB" %d\\n"\fP.
 .SH "EXIT STATUS"
 .TP
 .B 0