MFen:
1.49 -> 1.50 Makefile
1.73 -> 1.74 docs.sgml
1.17 -> 1.18 docproj/current.sgml
1.75 -> 1.77 projects/projects.sgml

Submitted by: Shun SUZUKI <si006@ccm.gs.niigata-u.ac.jp>
Reviewed by: Hiroki Sato <hrs@geocities.co.jp>
References: [doc-jp 6810]