only this code doesnt work..
let try this like

Code:

sed -e '/<VirtualHost/d' -e '/^\# A/d' myfile

this code doesnt work..

+ isnt unnecessary..this character doesnt merge multilines in sed..
for multi line edit use N

or with + use extended regular expression with r

Code:

sed -r '/<VirtualHost._+/d' test | sed -r '/<VirtualHost>.?/d' | sed -e '/# A/d'
SSLMutex  file:/var/run/ssl_mutex
#another config

Posix basic regular expression syntax without -r option (instead of use extended regular expressions)

Code:

sed -e '/<VirtualHost.\+/d' -e '/<VirtualHost>\?/d' test | sed -e '/# A/d'
SSLMutex  file:/var/run/ssl_mutex
#another config

Regards
ygemici