Merge branch 'cb/pcre2-chartables-leakfix'

Leakfix.

* cb/pcre2-chartables-leakfix:
  grep: avoid leak of chartables in PCRE2
  grep: make PCRE2 aware of custom allocator
  grep: make PCRE1 aware of custom allocator

builtin/grep.c

@@ -1147,5 +1147,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
 		run_pager(&opt, prefix);
 	clear_pathspec(&pathspec);
 	free_grep_patterns(&opt);
+	grep_destroy();
 	return !hit;
 }