bugfix: hyperlinks now work in pdf/a output

src/lev-protokoll.mk

@@ -47,6 +47,7 @@ compile_md = pandoc \
 	--variable colorlinks:true \
 	--variable csquotes:true \
 	--variable lang:de-DE \
+	--variable hyperrefoptions:pdfa \
 	--output $(3)
 
 GSFLAGS := \
@@ -64,8 +65,7 @@ postprocess_pdf = gs \
 	-dCompatibilityLevel=1.7 \
 	-dPDFSETTINGS=/ebook \
 	-sOutputFile=$(2) \
-	$(1) \
-	2>/dev/null
+	$(1)
 
 convert_pdfa = /opt/pdfa/bin/gs-919-linux_x86_64 \
 	$(GSFLAGS) \
@@ -74,8 +74,7 @@ convert_pdfa = /opt/pdfa/bin/gs-919-linux_x86_64 \
 	-dPDFACompatibilityPolicy=1 \
 	-sOutputFile=$(2) \
 	/opt/pdfa/PDFA_def.ps \
-	$(1) \
-	2>/dev/null
+	$(1)
 
 md2pdf = $(call compile_md,pdf,$(1),-) | $(call postprocess_pdf,-,$(2))