### Description
alias_db_lookup is returning `-1` if result is not found. The documentation says "The function returns TRUE if R-URI is alias and it was replaced by user's SIP uri." The implication is that it should return FALSE if that is not the case. Sample code:
``` $vn(init_ruri) = $ru; $vn(alias_found) = alias_db_lookup("DbAliases"); xlogl("L_NOTIFY", "$$vn(alias_found) is [$vn(alias_found)]\n"); if ( !$vn(alias_found) ) { xlogl("L_NOTIFY", "No alias found for [$vn(init_ruri)]\n"); return; }
xlogl("L_NOTIFY", "Found alias [$ru] for [$vn(init_ruri)]\n"); ```
The value for $vn(alias_found) is -1 if there is no alias, and thus the condition never occurs. "Found alias" line always occurs, even if there is no record in the DB.
I think this should probably be considered a documentation issue, but I'm not sure what the other possible values are for return and their meanings. Maybe there's a different value if an alias is found but not updated, etc?
### Troubleshooting
Example above
#### Reproduction
Example above.
#### Debugging Data
Not applicable
#### Log Messages
N/A
#### SIP Traffic
N/A
### Possible Solutions
Probably best to update documentation. The statement, "The function returns TRUE if R-URI is alias and it was replaced by user's SIP uri." implies that if that does not happen, then the return would be FALSE.
### Additional Information
`5.4.1`
* **Operating System**:
Debian 10