- The old LANGCODE detection was bogus and did not work properly with

release notes. Use a different approach that works.

share/mk/doc.common.mk

@@ -20,20 +20,8 @@ DOC_PREFIX_NAME?=	head
 .endif
 
 .if (!defined(LANGCODE) || empty(LANGCODE))
-# Calculate _LANGCODE.
-_LANGCODE:=	${.CURDIR}
-. for _ in 1 2 3 4 5 6 7 8 9 10
-.  if !(${_LANGCODE:H:T} == ${DOC_PREFIX_NAME})
-_LANGCODE:=	${_LANGCODE:H}
-.  endif
-. endfor
-_LANGCODE:=	${_LANGCODE:T}
-.else # (!defined(LANGCODE) || empty(LANGCODE))
-# when LANGCODE is defined, use the value.
-_LANGCODE?=	${LANGCODE}
-.endif # (!defined(LANGCODE) || empty(LANGCODE))
-
-LANGCODE?=	${_LANGCODE}
+LANGCODE!=	echo ${.CURDIR} | grep -o '[a-z]*_[A-Z]*\.[-A-Za-z0-9]*' || true
+.endif
 
 # normalize DOC_PREFIX
 DOC_PREFIX!=	${REALPATH} ${DOC_PREFIX}