Add GIT_CAP_SSH if library was built with SSH

This also adds a test that actually calls git_libgit2_capabilities
and git_libgit2_version.

Author: arrbee

include/git2/common.h

@@ -105,7 +105,8 @@ GIT_EXTERN(void) git_libgit2_version(int *major, int *minor, int *rev);
  */
 typedef enum {
 	GIT_CAP_THREADS			= ( 1 << 0 ),
-	GIT_CAP_HTTPS			= ( 1 << 1 )
+	GIT_CAP_HTTPS			= ( 1 << 1 ),
+	GIT_CAP_SSH				= ( 1 << 2 ),
 } git_cap_t;
 
 /**

src/util.c

@@ -32,6 +32,9 @@ int git_libgit2_capabilities()
 #endif
 #if defined(GIT_SSL) || defined(GIT_WINHTTP)
 		| GIT_CAP_HTTPS
+#endif
+#if defined(GIT_SSH)
+		| GIT_CAP_SSH
 #endif
 	;
 }

tests-clar/core/caps.c

@@ -0,0 +1,31 @@
+#include "clar_libgit2.h"
+
+void test_core_caps__0(void)
+{
+	int major, minor, rev, caps;
+
+	git_libgit2_version(&major, &minor, &rev);
+	cl_assert_equal_i(LIBGIT2_VER_MAJOR, major);
+	cl_assert_equal_i(LIBGIT2_VER_MINOR, minor);
+	cl_assert_equal_i(LIBGIT2_VER_REVISION, rev);
+
+	caps = git_libgit2_capabilities();
+
+#ifdef GIT_THREADS
+	cl_assert((caps & GIT_CAP_THREADS) != 0);
+#else
+	cl_assert((caps & GIT_CAP_THREADS) == 0);
+#endif
+
+#if defined(GIT_SSL) || defined(GIT_WINHTTP)
+	cl_assert((caps & GIT_CAP_HTTPS) != 0);
+#else
+	cl_assert((caps & GIT_CAP_HTTPS) == 0);
+#endif
+
+#if defined(GIT_SSH)
+	cl_assert((caps & GIT_CAP_SSH) != 0);
+#else
+	cl_assert((caps & GIT_CAP_SSH) == 0);
+#endif
+}