Fix the following warnings (occured under FreeBSD 3.1, GCC 2.95):

| egcc -c  -I../../os/unix -I../../include   -funsigned-char -DTARGET=\"apache\"
| -DDEV_RANDOM=/dev/random -DUSE_EXPAT -I../../lib/expat-lite -pipe -O2
| -pedantic -Wall -Wshadow -Wpointer-arith -Wcast-align -Wmissing-prototypes
| -Wmissing-declarations -Wnested-externs -Winline `../../apaci`
| mod_auth_digest.c
| mod_auth_digest.c:1095: warning: declaration of `time' shadows global
| declaration
| mod_auth_digest.c: In function `gen_nonce_hash':
| mod_auth_digest.c:1098: warning: declaration of `time' shadows global
| declaration
| mod_auth_digest.c: In function `authenticate_digest_user':
| mod_auth_digest.c:1605: warning: `main' is usually a function


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83617 13f79535-47bb-0310-9956-ffa450edef68