Add recipe for libssh 0.10.6 (JuliaPackaging#7903)

* Add recipe for libssh 0.10.6

* fixup! Add recipe for libssh 0.10.6

* fixup! Add recipe for libssh 0.10.6

* fixup! Add recipe for libssh 0.10.6

L/libssh/build_tarballs.jl

@@ -0,0 +1,68 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder, Pkg
+
+name = "libssh"
+version = v"0.10.6"
+
+# Collection of sources required to complete build
+sources = [
+    ArchiveSource("https://www.libssh.org/files/$(version.major).$(version.minor)/libssh-$(version).tar.xz", "1861d498f5b6f1741b6abc73e608478491edcf9c9d4b6630eef6e74596de9dc1")
+]
+
+# Bash recipe for building across all platforms
+script = raw"""
+# Necessary for cmake to find openssl on Windows
+if [[ ${target} == x86_64-*-mingw* ]]; then
+    export OPENSSL_ROOT_DIR=${prefix}/lib64
+fi
+
+DOC_DIR=${prefix}/usr/share/doc/libssh
+
+# Build and install library
+cd $WORKSPACE/srcdir/libssh-*
+mkdir build
+cd build/
+
+# Kerberos_krb5_jll is only built for Linux and FreeBSD, so GSSAPI support is
+# only available on those platforms.
+if [[ ${target} == *linux* || ${target} == *freebsd* ]]; then
+    export GSSAPI_ENABLED=ON
+else
+    export GSSAPI_ENABLED=OFF
+fi
+
+cmake -DCMAKE_INSTALL_PREFIX=$prefix -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TARGET_TOOLCHAIN} \
+                                     -DCMAKE_BUILD_TYPE=Release \
+                                     -DWITH_GSSAPI=${GSSAPI_ENABLED} \
+                                     -DWITH_EXAMPLES=OFF \
+                                     -DDOXYGEN_GENERATE_TAGFILE='tags.xml' ..
+make -j${nproc}
+make docs install
+
+# Install Doxygen tagfile
+mkdir -p ${DOC_DIR}
+install -Dv ../doc/tags.xml "${DOC_DIR}/tags.xml"
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = supported_platforms()
+
+
+# The products that we will ensure are always built
+products = [
+    LibraryProduct("libssh", :libssh),
+    FileProduct("usr/share/doc/libssh/tags.xml", :doxygen_tags)
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = [
+    HostBuildDependency("Doxygen_jll"),
+    Dependency("Kerberos_krb5_jll"; compat="1.19.3"),
+    Dependency(PackageSpec(name="OpenSSL_jll", uuid="458c3c95-2e84-50aa-8efc-19380b2a3a95"); compat="3.0.8"),
+    Dependency(PackageSpec(name="Zlib_jll", uuid="83775a58-1f1d-513f-b197-d71354ab007a"); compat="1.2.12")
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies; julia_compat="1.6")