Removes a dependency on grefer from the man page
Removes a dependency on grefer from the man page

The man page man/libvecpf.3 does not use any feature from the grefer tool,
however it asks man to preprocess the man page with such tool. This commit
removes this dependency, thus enabling the man page to be opened on systems
that do not have grefer installed.

Libvecpf/libvecpf,Libvecpf/libvecpf