Add documentation of some text functions.
Add descriptions of some new SQL/92-compatible string functions.

Create explicit drop_table man page (copied from old drop man page).

someone will have to tell me

so that permissions are set for the end release...

Should be changed for v6.3!

 Polygon input would not accept single-point polygon output and dump.

clauses.

Add SQL/92 types decimal and numeric (temporary for syntax support).
 These types need more support in the backend to be really implemented,
 and the parser will need to be changed at that time.
Adjust limits on precision parameters for FLOAT(p) to match IEEE-compliant
 arithmetic. Perhaps these limits should be processor-specific or obtained
 from system include files instead.

Add SQL/92 "constants" current_date, current_time, and current_timestamp.

 like newline inside quoted strings.