xbps_configure_pkg: try to use pkgname if possible to configure a pkg.
xbps_configure_pkg: try to use pkgname if possible to configure a pkg.

In pwwka's case for some reason the transaction was trying to configure
'man-pages-3.62_1' while in pkgdb there was only 'man-pages-3.55_1'.

By using the pkgname the pkg stored in pkgdb will be configured, without
caring what version it is.

ebfe/xbps,stpx/xbps,datenwolf/xbps,ebfe/xbps,stpx/xbps,ebfe/xbps,stpx/xbps,datenwolf/xbps,datenwolf/xbps