Bug#883999: man page improper header usage

[積丹尼 Dan Jacobson]

Package: bitcoin-qt
Version: 0.15.1~dfsg-1
Severity: minor
File: /usr/share/man/man1/bitcoin-qt.1.gz

Please make this

     NAME
            bitcoin-qt - manual page for bitcoin-qt v0.15.0.1

     DESCRIPTION
            Bitcoin Core version v0.15.0.1-dirty (64-bit) Usage:

                   bitcoin-qt [command-line options]

better conform to example:

     NAME
            cat - concatenate files and print on the standard output

     SYNOPSIS
            cat [OPTION]... [FILE]...

     DESCRIPTION
            Concatenate FILE(s) to standard output.