mail, mailx, mesg, mmv, monop, most, mscore: add link (#6795)

pages/common/mail.md

@@ -2,6 +2,7 @@
 
 > The command operates on the user's mailbox if no argument is given.
 > To send an email the message body is built from standard input.
+> More information: <https://manned.org/mail>.
 
 - Send a typed email message. The command-line below continues after pressing Enter key. Input CC email-id (optional) press Enter key. Input message text (can be multiline). Press Ctrl-D key to complete the message text:
 

pages/common/mailx.md

@@ -1,6 +1,7 @@
 # mailx
 
 > Send and receive mail.
+> More information: <https://manned.org/mailx>.
 
 - Send mail (the content should be typed after the command, and ended with `Ctrl+D`):
 

pages/common/mesg.md

@@ -2,6 +2,7 @@
 
 > Check or set a terminal's ability to receive messages from other users, usually from the write command.
 > See also `write`.
+> More information: <https://manned.org/mesg>.
 
 - Check terminal's openness to write messages:
 

pages/common/mmv.md

@@ -1,6 +1,7 @@
 # mmv
 
 > Move and rename files in bulk.
+> More information: <https://manned.org/mmv.1>.
 
 - Rename all files with a certain extension to a different extension:
 

pages/common/monop.md

@@ -1,6 +1,7 @@
 # monop
 
 > Finds and displays signatures of Types and methods inside .NET assemblies.
+> More information: <https://manned.org/monop>.
 
 - Show the structure of a Type built-in of the .NET Framework:
 

pages/common/most.md

@@ -1,6 +1,7 @@
 # most
 
 > Open one or several files for interactive reading, allowing scrolling and search.
+> More information: <https://manned.org/most>.
 
 - Open a file:
 

pages/common/mscore.md

@@ -1,6 +1,7 @@
 # mscore
 
 > This command is an alias of `musescore`.
+> More information: <https://musescore.org/handbook/command-line-options>.
 
 - View documentation for the original command: