manpages: small formatting improvements

- use `.Os` to show "Void Linux" in the footer
- use `Aq Mt` to display email addresses
- use `.Lk` for the bug link
- remove unnecessary use of `.Nm <name>` when already defined
- add xbps-alternatives(1) to SEE ALSO where missing
- bump date

bin/xbps-fbulk/xbps-fbulk.1

@@ -1,10 +1,11 @@
 .Dd April 20, 2020
 .Dt XBPS-FBULK 1
+.Os
 .Sh NAME
 .Nm xbps-fbulk
 .Nd XBPS utility to perform a fast bulk build of void-packages
 .Sh SYNOPSIS
-.Nm xbps-fbulk
+.Nm
 .Op OPTIONS
 .Ar /path/to/void-packages
 .Op pkgN pkg+N ...
@@ -93,6 +94,7 @@ has rights to execute
 and the kernel supports the overlay filesystem, introduced in 4.0.
 .Pp
 .Sh SEE ALSO
+.Xr xbps-alternatives 1 ,
 .Xr xbps-checkvers 1 ,
 .Xr xbps-create 1 ,
 .Xr xbps-dgraph 1 ,
@@ -111,14 +113,15 @@ and the kernel supports the overlay filesystem, introduced in 4.0.
 The
 .Nm
 utility was originally written by
-.An Matthew Dillon <dillon@backplane.com>
+.An Matthew Dillon Aq Mt dillon@backplane.com
 for the
 .Ar DragonFlyBSD project.
 .Pp
-.An Juan Romero Pardines <xtraeme@gmail.com>
+.An Juan Romero Pardines Aq Mt xtraeme@gmail.com
 adapted it for xbps and added some new features.
 .Sh BUGS
 Probably, but I try to make this not happen. Use it under your own
 responsibility and enjoy your life.
 .Pp
-Report bugs at https://github.com/void-linux/xbps/issues
+Report bugs at
+.Lk https://github.com/void-linux/xbps/issues