K 10
svn:author
V 3
0mp
K 8
svn:date
V 27
2020-10-04T21:35:55.266732Z
K 7
svn:log
V 181
Clean up port's makefile

In particular:
- Remove DOCBOOK_VERSION variable, it was supposed to be removed in r377770.
- Switch to using USES=localbase

Approved by:	portmgr blanket

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