SNMP: The fields tag and cls are variables in Pike 8.0.
TagCache: Fix bug that prevented persistent saving of alternatives.
PCode: Make sure to compile everything in PCode used by subevalers.

This helps breaking up cycles, resulting in less garbage.
1000 iterations doesn't seem to be enough when collecting PCode objects.
SNMP: The LDAP private ASN.1 classes aren't available in Pike 8.0.
Roxen: Use the current names for the ASN1 classes.

These names have been obsolete since 2003-01-26 (11 years 5 months).
Merge branch 'patches/pike8.0' into devel

* patches/pike8.0:
  Roxen: Use the current names for the ASN1 classes.
  SNMP: The LDAP private ASN.1 classes aren't available in Pike 8.0.
  SNMP: The fields tag and cls are variables in Pike 8.0.