tang: do not require bash and curl (backport from 23.05)

Signed-off-by: Nikos Mavrogiannopoulos <n.mavrogiannopoulos@gmail.com>

utils/tang/Makefile

@@ -27,7 +27,7 @@ include $(INCLUDE_DIR)/meson.mk
 define Package/tang
   SECTION:=utils
   TITLE:=tang v$(PKG_VERSION) - daemon for binding data to the presence of a third party
-  DEPENDS:=+libhttp-parser +jose +bash
+  DEPENDS:=+libhttp-parser +jose
   URL:=https://github.com/latchset/tang
   USERID:=tang:tang
 endef

utils/tang/patches/100-tang-show-keys-use-wget.patch

@@ -0,0 +1,16 @@
+diff --git a/src/tang-show-keys b/src/tang-show-keys
+index 0c33c3a..4b64bda 100755
+--- a/src/tang-show-keys
++++ b/src/tang-show-keys
+@@ -25,9 +25,9 @@ if [ $# -gt 1 ]; then
+     exit 1
+ fi
+ 
+-port=${1-80}
++port=${1-9090}
+ 
+-adv=$(curl -sSf "localhost:$port/adv")
++adv=$(wget -qO- "http://127.0.0.1:$port/adv")
+ 
+ THP_DEFAULT_HASH=S256    # SHA-256.
+ jose fmt --json "${adv}" -g payload -y -o- \