improve documentation of soffice --accept parameter

Change-Id: I8058bad949c973981013d099dba78b3e64cee0aa
Reviewed-on: https://gerrit.libreoffice.org/68735
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

desktop/source/app/cmdlinehelp.cxx

@@ -98,8 +98,10 @@ namespace desktop
         "                       configuration.                                          \n"
         "   --accept={UNO-URL}  Specifies an UNO-URL connect-string to create an UNO    \n"
         "                       acceptor through which other programs can connect to    \n"
-        "                       access the API. UNO-URL is string the such kind         \n"
-        "                   uno:connection-type,params;protocol-name,params;ObjectName. \n"
+        "                       access the API. Note that API access allows execution   \n"
+        "                       of arbitrary commands.                                  \n"
+        "                       The syntax of an UNO-URL connect-string is:             \n"
+        "                   uno:connection-type,params;protocol-name,params;ObjectName  \n"
         "   --unaccept={UNO-URL} Closes an acceptor that was created with --accept. Use \n"
         "                       --unaccept=all to close all open acceptors.             \n"
         "   --language={lang}   Uses specified language, if language is not selected    \n"

sysui/desktop/man/libreoffice.1

@@ -48,8 +48,11 @@ sbase, scalc, sdraw, simpress, smath, sofficerc, swriter
 .SH OPTIONS
 .TP
 \fB\-\-accept=\fIaccept\-string\fR
-Specify a UNO connect-string to create a UNO acceptor through which other
-programs can connect to access the API.
+Specifies an UNO-URL connect-string to create a UNO acceptor through which other
+programs can connect to access the API. Note that API access allows execution
+of arbitrary commands.
+The syntax of an UNO-URL connect-string is:
+\fIuno:connection-type,params;protocol-name,params;ObjectName\fR
 
 .TP
 \fB\-\-base\fR