treewide: remove jemalloc

Jemalloc is now history. Goodnight, sweet prince.

ref: https://jasone.github.io/2025/06/12/jemalloc-postmortem/

Dockerfile.base

@@ -54,7 +54,6 @@ RUN apt-env.sh apt-get update ; \
       jdupes \
       jq \
       libcap2-bin \
-      libjemalloc2 \
       logrotate \
       netbase \
       netcat-openbsd \

image-entry.d/70-merge-dirs.sh

@@ -5,6 +5,9 @@ set -ef
 
 ## hack: override "cache", "lib" and "log" from /angie (and possibly from /etc/angie)
 fake_dir=$(mktemp -d)
+if [ "${NGX_HTTP_STATIC_MERGE}" = 0 ] ; then
+	persist_dirs="${persist_dirs} static"
+fi
 for n in ${persist_dirs} ; do touch "${fake_dir}/$n" ; done
 
 install -d "${target_root}"
@@ -18,7 +21,6 @@ if [ "${NGX_HTTP_STATIC_MERGE}" = 0 ] ; then
 	src0=/etc/angie.dist/static
 	dst="${target_root}/static"
 
-	rm -rf "${dst}"
 	for r in /angie /etc/angie ; do
 		src="$r/static"
 		[ -d "${src}" ] || continue
@@ -29,6 +31,7 @@ if [ "${NGX_HTTP_STATIC_MERGE}" = 0 ] ; then
 
 		install -d "${dst}"
 		overlaydirs --merge "${dst}" ${src0} "${src}"
+		break
 	done
 	[ -d "${dst}" ] || {
 		log_always "static directory is almost empty!"

image-entry.sh

@@ -25,11 +25,6 @@ iep_preserve_env() {
 	unset __IEP_MALLOC_ARENA_MAX
 	__IEP_MALLOC_ARENA_MAX="${MALLOC_ARENA_MAX:-4}"
 	export MALLOC_ARENA_MAX=2
-
-	## jemalloc: preserve MALLOC_CONF
-	unset __IEP_MALLOC_CONF
-	__IEP_MALLOC_CONF="${MALLOC_CONF:-}"
-	unset MALLOC_CONF
 }
 
 iep_restore_env() {
@@ -52,12 +47,6 @@ iep_restore_env() {
 		export MALLOC_ARENA_MAX="${__IEP_MALLOC_ARENA_MAX}"
 	fi
 	unset __IEP_MALLOC_ARENA_MAX
-
-	## jemalloc: restore MALLOC_CONF
-	if [ -n "${__IEP_MALLOC_CONF:-}" ] ; then
-		export MALLOC_CONF="${__IEP_MALLOC_CONF}"
-	fi
-	unset __IEP_MALLOC_CONF
 }
 
 iep_flush_volume() {

j2cfg/j2cfg/settings.py

@@ -34,8 +34,6 @@ J2CFG_PRESERVE_ENVS = [
     # glibc
     'GLIBC_TUNABLES',
     'MALLOC_ARENA_MAX',
-    # jemalloc
-    'MALLOC_CONF',
 ]
 
 J2CFG_PASSTHROUGH_ENVS = [