Fix Lintian warnings

[krekhovx]

Hi, I from Debian community. I'm trying to package your software into a Debian package. Lintian utility says:

W: clipboard: bad-whatis-entry [usr/share/man/man1/cb.1.gz]
N: 
N:   A manual page should start with a NAME section, which lists the program
N:   name and a brief description. The NAME section is used to generate a
N:   database that can be queried by commands like apropos and whatis. You are
N:   seeing this tag because lexgrog was unable to parse the NAME section.
N:   
N:   Manual pages for multiple programs, functions, or files should list each
N:   separated by a comma and a space, followed by \- and a common description.
N:   
N:   Listed items may not contain any spaces. A manual page for a two-level
N:   command such as fs listacl must look like fs_listacl so the list is read
N:   correctly.
N: 
N:   Please refer to the lexgrog(1) manual page, the groff_man(7) manual page,
N:   and the groff_mdoc(7) manual page for details.
N: 
N:   Visibility: warning
N:   Show-Always: no
N:   Check: documentation/manual
N:   Renamed from: manpage-has-bad-whatis-entry

I agree with this. It would be better to change the format of the manual a little.

and more, during the process of building the package I noticed some warnings from the Lintian utility (the lack of sonames in libraries and versions).

It is also important to add the 'x' bit for scripts.