mod_dav_svn: Use mod_dav's DAVBasePath setting #236

Job	Run time
ubuntu-latest, target check, system httpd	8m 24s
ubuntu-latest, target check, trunk httpd	8m 58s
ubuntu-latest, target check, 2.4.x httpd	9m 17s
ubuntu-22.04-arm, target check, system httpd	10m 48s
ubuntu-22.04-arm, target check, trunk httpd	9m 39s
ubuntu-22.04-arm, target check, 2.4.x httpd	10m 50s
ubuntu-latest, target davautocheck, system httpd	9m 38s
ubuntu-latest, target davautocheck, trunk httpd	6m 0s
ubuntu-latest, target davautocheck, 2.4.x httpd	10m 40s
ubuntu-22.04-arm, target davautocheck, system httpd	11m 51s
ubuntu-22.04-arm, target davautocheck, trunk httpd	7m 14s
ubuntu-22.04-arm, target davautocheck, 2.4.x httpd	11m 44s
	1h 55m 3s

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