ulfius: pin the babelouest chain; add orcania and yder; fix directory typo

The ulfius recipe tracked AUTOREV master and could never build: master
requires orcania/yder versions that have no release tags, no recipe for
either existed in any layer, and curl (default-ON WITH_CURL) was
missing from DEPENDS (audit M10). Pin the coherent release set - ulfius
v2.7.15 + orcania v2.3.3 + yder v1.4.20 - add the two new recipes,
add curl, convert to SPDX LGPL-2.1-or-later, and rename the misspelled
recipes-extended/uflius directory.

meta-forgefirm/recipes-extended/ulfius/ulfius_2.7.15.bb

@@ -0,0 +1,23 @@
+DESCRIPTION = "Web Framework to build REST APIs, Webservices or any HTTP endpoint in C"
+HOMEPAGE = "https://github.com/babelouest/ulfius"
+
+LICENSE = "LGPL-2.1-or-later"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=40d2542b8c43a3ec2b7f5da31a697b88"
+
+# Pinned to the v2.7.15 release tag, together with orcania v2.3.3 and
+# yder v1.4.20 (its release-mate dependency versions). AUTOREV against master
+# was unbuildable: master's CMake requires orcania/yder versions that have no
+# release tags, and the git:// fetch never brought in the bundled-subproject
+# fallback (audit M10).
+SRC_URI = "git://github.com/babelouest/ulfius;protocol=https;branch=master"
+SRCREV = "a0603447d3ed63c0880db396b9c395fb4bf6b559"
+
+S = "${WORKDIR}/git"
+
+inherit cmake pkgconfig
+
+# curl backs the default-ON WITH_CURL client-request API (find_package REQUIRED).
+DEPENDS = "gnutls jansson libmicrohttpd curl orcania yder"
+
+# No systemd journald on the forgefirm image.
+EXTRA_OECMAKE += "-DWITH_JOURNALD=off"