r2594 - eval_expression(): $silent arg to hide error messages
- ibid: return NULL on error and pass returned NULL upwards w/o converting to FALSE
- getSentencesFromLexems(): rename to getParseTreeFromLexems()
- getParseTreeFromLexems(): move ACK/NAK decision making to a more general spotPayload()
- getLexemsFromRackCode(): rename to getLexemsFromRawText()
- getLexemsFromRawText(): add mock character for better scanner syncing
- lexError3(): tell scanner state in error message
- filterEntityList(): moved most of the code into new buildPredicateTable() and new judgeEntity()
- getIPv4LBList(): new function makes use of the new code to enhance renderVServiceLBForm() and renderRSPoolLBForm()
- trigger_lvsconfig(): replaced with trigger_isloadbalancer(), which uses IPV4LB_LISTSRC
- renamed 'LVS config' tab to 'keepalived.conf'