pages*: uniform manned link (#13637)

pages/common/bc.md

@@ -2,7 +2,7 @@
 
 > An arbitrary precision calculator language.
 > See also: `dc`, `qalc`.
-> More information: <https://manned.org/bc.1>.
+> More information: <https://manned.org/bc>.
 
 - Start an interactive session:
 

pages/common/nc.md

@@ -1,7 +1,7 @@
 # nc
 
 > Redirect I/O into a network stream through this versatile tool.
-> More information: <https://manned.org/nc.1>.
+> More information: <https://manned.org/nc>.
 
 - Start a listener on the specified TCP port and send a file into it:
 

pages/common/shar.md

@@ -1,7 +1,7 @@
 # shar
 
 > Create a shell archive.
-> More information: <https://manned.org/man/freebsd/shar>.
+> More information: <https://manned.org/shar>.
 
 - Create a shell script that when executed extracts the given files from itself:
 

pages/common/touch.md

@@ -1,7 +1,7 @@
 # touch
 
 > Create files and set access/modification times.
-> More information: <https://manned.org/man/freebsd-13.1/touch>.
+> More information: <https://manned.org/touch>.
 
 - Create specific files: