chmod.2: Use argument name 'pathname' throughout page

(Some APIs were using 'path' while others used 'pathname')

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/chmod.2

@@ -36,7 +36,7 @@ chmod, fchmod, fchmodat \- change permissions of a file
 .nf
 .B #include <sys/stat.h>
 .sp
-.BI "int chmod(const char *" path ", mode_t " mode );
+.BI "int chmod(const char *" pathname ", mode_t " mode );
 .br
 .BI "int fchmod(int " fd ", mode_t " mode );
 .sp
@@ -88,7 +88,7 @@ They differ only in how the file is specified:
 .IP * 2
 .BR chmod ()
 changes the permissions of the file specified whose pathname is given in
-.IR path ,
+.IR pathname ,
 which is dereferenced if it is a symbolic link.
 .IP *
 .BR fchmod ()
@@ -247,7 +247,7 @@ Search permission is denied on a component of the path prefix.
 .BR path_resolution (7).)
 .TP
 .B EFAULT
-.I path
+.I pathname
 points outside your accessible address space.
 .TP
 .B EIO
@@ -255,10 +255,10 @@ An I/O error occurred.
 .TP
 .B ELOOP
 Too many symbolic links were encountered in resolving
-.IR path .
+.IR pathname .
 .TP
 .B ENAMETOOLONG
-.I path
+.I pathname
 is too long.
 .TP
 .B ENOENT