[PATCH] Manual pages: use "root user ID" rather than "rootid"

["Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>]

The capabilities(7) page has for quite some time used the term "root user ID",
which is, I think, a little more precise and expressive than "rootid".
I think it would be good if libcap used the same terminology,

Signed-off-by: Michael Kerrisk (man-pages) <mtk.manpages@gmail.com>
---
 doc/cap_get_file.3 | 6 +++---
 doc/getcap.8       | 3 ++-
 doc/setcap.8       | 8 ++++----
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/doc/cap_get_file.3 b/doc/cap_get_file.3
index ceacbaf..3f73734 100644
--- a/doc/cap_get_file.3
+++ b/doc/cap_get_file.3
@@ -18,7 +18,7 @@ manipulation on files
 .sp
 .BI "uid_t cap_get_nsowner(cap_t " caps );
 .sp
-.BI "int cap_set_nsowner(cap_t " caps ", uid_t " rootid );
+.BI "int cap_set_nsowner(cap_t " caps ", uid_t " rootuid );
 .sp
 Link with \fI\-lcap\fP.
 .SH DESCRIPTION
@@ -66,13 +66,13 @@ capability in its effective capability set.  The effects of writing the
 capability state to any file type other than a regular file are
 undefined.
 .PP
-A capability set held in memory can be associated with the rootid in
+A capability set held in memory can be associated with the root user ID in
 use in a specific user namespace. It is possible to get and set this value
 (in the memory copy) with
 .BR cap_get_nsowner ()
 and
 .BR cap_set_nsowner ()
-respectively. The rootid is ignored by the libcap library in all cases
+respectively. The root user ID is ignored by the libcap library in all cases
 other than when the capability is written to a file. Only if the value
 is non-zero will the library attempt to include it in the written file
 capability set.
diff --git a/doc/getcap.8 b/doc/getcap.8
index 2ad8092..04b601c 100644
--- a/doc/getcap.8
+++ b/doc/getcap.8
@@ -13,7 +13,8 @@ displays the name and capabilities of each specified file.
 prints quick usage.
 .TP 4
 .B \-n
-prints any non-zero user namespace rootid value found to be associated with
+prints any non-zero user namespace root user ID value
+found to be associated with
 a file's capabilities.
 .TP 4
 .B \-r
diff --git a/doc/setcap.8 b/doc/setcap.8
index 582c781..463752d 100644
--- a/doc/setcap.8
+++ b/doc/setcap.8
@@ -2,7 +2,7 @@
 .SH NAME
 setcap \- set file capabilities
 .SH SYNOPSIS
-\fBsetcap\fP [\-q] [\-n <rootid>] [\-v] {\fIcapabilities|\-|\-r} filename\fP [ ... \fIcapabilitiesN\fP \fIfileN\fP ]
+\fBsetcap\fP [\-q] [\-n <rootuid>] [\-v] {\fIcapabilities|\-|\-r} filename\fP [ ... \fIcapabilitiesN\fP \fIfileN\fP ]
 .SH DESCRIPTION
 In the absence of the
 .B \-v
@@ -13,13 +13,13 @@ sets the capabilities of each specified
 to the
 .I capabilities
 specified.  The optional
-.B \-n <rootid>
+.B \-n <rootuid>
 argument can be used to set the file capability for use only in a
-user namespace with this rootid owner. The
+user namespace with this root user ID owner. The
 .B \-v
 option is used to verify that the specified capabilities are currently
 associated with the file. If \-v and \-n are supplied, the
-.B \-n <rootid>
+.B \-n <rootuid>
 argument is also verified.
 .PP
 The
-- 
2.26.2