Revert "Option to build both static and shared libraries (#547)" (#675)
Revert "Option to build both static and shared libraries (#547)" (#675)

This reverts commit b60dca8b6450a9729670986d2899cca54ccdbb6d.

#547 doesn't build clean anymore with the keyboard interactive changes.
libssh2/libssh2,libssh2/libssh2,libssh2/libssh2,libssh2/libssh2