qpdf - qpdf + zopfli patch

Age	Commit message (Collapse)	Author
2021-12-18	Remove unused import	Jay Berkenbilt

2020-10-25	Build Windows releases with openssl; automate external libraries	Jay Berkenbilt
	External libraries for Windows are now built automatically in the qpdf/external-libs repository and include openssl in addition to zlib and jpeg. Use these, and update the Windows build to build with the openssl crypto provider by default. We leave the native crypto provider enabled in case there is a problem with openssl and also to continue to exercise that code.