• adds USES+= gl (USE_GL without USES+= gl is deprecated);
• adds USES+= desktop-file-utils iconv;
• adds USE_XORG+= xcursor xinerama xrender;
• adds USE_QT+= printsupport sql widgets;
• strips liboctave.so.6.0.0.
• Corrects configure options for --withosmesa

PR: ports/233240
Submitted by: Lorenzo Salvadore <phascolarctos@protonmail.ch>