docs: update man for sesman.ini

Not to confuse the default value written in config and the default
value will be used when not specified in config use the words
"it not specified, defaults to foobar" for the latter.

And other miscellaneous changes,

- Fix typo
- Emphasize the default value

docs/man/sesman.ini.5

@@ -47,11 +47,12 @@ Following parameters can be used in the \fB[Globals]\fR section.
 
 .TP
 \fBListenAddress\fR=\fIip address\fR
-xrdp-sesman listening address. Default is 0.0.0.0 (all interfaces).
+xrdp-sesman listening address. If not specified, defaults to \fI0.0.0.0\fR
+(all interfaces).
 
 .TP
 \fBListenPort\fR=\fIport number\fR
-xrdp-sesman listening port. Default is 3350.
+xrdp-sesman listening port. If not specified, defaults to \fI3350\fR.
 
 .TP
 \fBEnableUserWindowManager\fR=\fI[0|1]\fR
@@ -75,8 +76,8 @@ Following parameters can be used in the \fB[Logging]\fR section.
 
 .TP
 \fBLogFile\fR=\fIfilename\fR
-Log file path. It can be either absolute or relative. The default is
-\fI./sesman.log\fR
+Log file path. It can be either absolute or relative. If not specified,
+defaults to \fI./sesman.log\fR
 
 .TP
 \fBLogLevel\fR=\fIlevel\fR
@@ -111,7 +112,8 @@ Following parameters can be used in the \fB[Sessions]\fR section.
 .TP
 \fBX11DisplayOffset\fR=\fInumber\fR
 The first X display number available for xrdp-sesman. This prevents
-xrdp-sesman from interfering with real X11 servers. The default is 10.
+xrdp-sesman from interfering with real X11 servers. If not specified,
+defaults to \fI10\fR.
 
 .TP
 \fBMaxSessions\fR=\fInumber\fR
@@ -170,8 +172,8 @@ terminal server.
 .TP
 \fBMaxLoginRetry\fR=\fInumber\fR
 The number of login attempts that are allowed on terminal server. If set
-to \fI0\fR, unlimited attempts are allowed. The default value for this
-field is \fI3\fR.
+to \fI0\fR, unlimited attempts are allowed. If not specified, defaults to
+\fI3\fR.
 
 .TP
 \fBTerminalServerUsers\fR=\fIgroup\fR
@@ -207,10 +209,10 @@ Following parameters can be used in the \fB[Chansrv]\fR section.
 .TP
 \fBFuseMountName\fR=\fIstring\fR
 Directory for drive redirection, relative to the user home directory.
-Created if it doesn't exist. Defaults to \fIxrdp_client\fR
+Created if it doesn't exist. If not specified, defaults to \fIxrdp_client\fR.
 
 .SH "SESSIONS VARIABLES"
-All entries it the \fB[SessionVariables]\fR section are set as
+All entries in the \fB[SessionVariables]\fR section are set as
 environment variables in the user's session.
 
 .SH "FILES"