Ondřej Surý authored Mar 31, 2021 and Ondřej Surý committed Apr 01, 2021

Previously, every function had it's own #ifdef GSSAPI #else #endif block
that defined shim function in case GSSAPI was not being used.  Now the
dummy shim functions have be split out into a single #else #endif block
at the end of the file.

This makes the gssapictx.c similar to 9.17.x code, making the backports
and reviews easier.